well... here's more tidbits of info for "dirt to street" ideas:
a) in the dirt it's easier to focus solely on riding, whereas on the street there's loads of unknowns, and things to slow ya down... thus it's never as safe to ride as intensely on the street. In the dirt there is often lots of room for error.. you can make room for yourself more easily, compared with the street... dirt is a lot more pure fun!

street is a different world for reasons of traffic mainly, but still has it's charms; i actually think street riding is my favourite because you can do it all the time, everyday; commuting by bike is WAYYY better than by car
b) the RULES in the dirt are much more basic/natural/obvious/real; the rules on the street are in many respects designed for drivers to accomodate the lowest common denominator (i.e. speed limits); more rules & regulations to pay attention too... (yawn)... or more rules to break as you deem um, necessary... necessary for entertainment value only, i s'ppose... as you relax get older, and kick back a little, like i have you may want to stop to smell the roses rather than the burnt rubber (yeah, tough call which is better!! -- actually i love the smell of hot tarmac, engines, oil, gas and rubber all mixed together - some fuels, especially 2-stroke mixes are freakin wonderful!). However, i have come to appreciate even more that i really don't mind doing pretty normal things on the street.. (i think i had to decide to just relax a lot on the street or i would've been in court fighting speeding tickets all the time, or worse) -- it's sort of like adapting an "almost riding a cruiser" mentality (which really doesnt fit well with owning an R6 for the street though). i've always loved street riding, yet in later years as my riding progressed (especially after doing more dirt riding) it was tougher to slow down. i almost always speed whatever i am driving, except later on i started to ignore the more important times to slow down (common police radar traps), and really the only places i rode slow were playground and school zones and when little kids were milling around. It takes work to back the brain down to street cruising.
c) even casual offroad riding is more like closed-course riding... maybe you'd have more fun doing some trackdays on the R6 --- money well spent (or lost if you crash)... but a good investment in experience and fun. it helps if you get a chance to wind the bike out for a bunch of laps, learn the bike a little and stretch your limits.
d) higher speeds on a streetbike and WAYYYY more traction make the riding experience different... i.e. by the time you're working hard enough to really slide a street bike around the cost of mistakes is much greater on the street. one thing i love about dirt bikes is how nicely they crash with minimal damage. sportbikes dont do that so well especially if it is a speed related incident (however buy a set of frame-sliders, they may save you some $$ in a crash). mailboxes, curbs, cars and things you can't bounce off as nicely are very plentiful on the street... you can get away with murder in a sports car, they are so forgiving, but sportbikes are now... they require attention and skill to really ride well.
one trick if youre a decent rider, i liked to ride on well-used tires, that way i had a lot more fun even on bikes with very little horsepower. makes it more like riding in the dirt. or get some more torque, the early Fireblade, CBR900RR is a pretty mellow big bore bike (almost too tame, wheras the R6 is more like a 2-stroke, but the revs really make you want to keep revving it out and you can get in tons of trouble just in the first two gears)... i haven't ridden any of the latest bigbore bikes, but i figure they are all lighter, with better chassis than the stuff i have ridden. i've ridden the Hayabusa and it's just sort of silly (it has huge pull anywhere above 4500rpm), but haven't ridden any of the current "real" 1000cc inline four sportbikes.
e) single vehicle accidents are common on the street, because when you get away from traffic, you're more inclined to push it, (whenever i am riding around others i rarely ride above 70% even if i know there habits well. the safety margin is important), and if you dont push it regularly you will make a mistake.. we all do eventually... i had only minor incidents on the street early on, and haven't crashed on the street since my first couple years riding... i saved the real fun for when i was in safer environments (i.e. off road -- some really ding dong crashes at mx tracks...)
f) all the fun you have off-road is quite often unattainable most of the time on the street therefore...
g) i find most of the current "pure" sportbikes to be wasted on the street. i'd opt for something else, and almost always have: more comfort, more usuability. of course some of the sport bikes still look much cooler, but all the good stuff is a waste on the street. I'd opt for something more all-around useful; most 1990 or newer sportbikes are worth a look; as for more current stuff the Yam FZ6, earlier model YZF600R, CBR600, etc. also big singles and twins are nice (TL1000S/SV1000 maybe if you want big torque), the Suzuki Vstrom 650 and 1000 (although they are kindof ugly)... on the street any decent rider will have no problem keeping up with his buddies on 10 or 15 year newer equipment and twice the horsepower, because it's easier to use the earlier bike to their potential... it's not like a 1990 GSXR750 wont do 150MPH and 11 second quarter miles. they handle very well. they work just fine; a friend has one of the best 1990-era bikes, the ZX7RR, which is still a great club racer bike. it's been refined over the years, and is still very competitive. the rider makes the most difference.
anyway.. hope that gets you thinking... it's hard to tear someone away from a bike they love, and the looks of the R6 are wicked... you'll probably end up buying one

but with more street riding experience later on you may appreciate other bikes for their less well advertised qualities.... sort of like having a girlfriend who enjoys the same movies

you might find yourself attached to the R6, and it's like watching Bruce Lee movies... after he's kicked the **** out of all the bad guys, even Bruce Lee and Co. martial arts movies can get old after awhile

but some people still want to watch them like Star Wars sequels (barf). Having one cool sport bike is always nice... you may just want to get a sport-touring bike later down the road, but you can enjoy the "high" from riding an R6 for awhile... everyone likes there ego tickled... that's what the manufacturers want to give you... you can ride a bike that is in reality very similar to what Jamie Hacking and Pascal Picotte are kicking butt on at the race track. i myself think it's always best to move up the ladder from the bottom (maybe an SV650 would be a perfect street ride for you)... as you develop on the street you can appreciate the newer better, faster bikes... that's just another 2-cent tip.
ok, so that's it, except in reality the bike you ride doesn't really matter, it's YOUR throttle hand at all times that does... faster... slower... more fun... less fun... warp 2... warp 4... so just keep the brain-to-throttle connection open as the R6 might have a strong hypnotic effect on that brain-to-throttle connection...
enjoy your R6
