I could't find any direct info on the warranty for the 250 but, according to www.stockmildtowild.com, the GV 650 has a 2yr/24K mile warranty. Maybe drop them an email to see what the warranty is on the other Alpha Sport bikes?
The 650 also has adjustable foot controls. The pegs adjust from slightly forward of "standard" out to "highway peg" reach. I sat on one at a dealership but, being short, I could barely touch the pegs in "highway" mode. The owner saw that (he was my salesman too) and told me about the adjustment.
It's a pretty cool and innovative bike in my opinion. If the dealership had been closer, I might have picked one up instead of my S50.