I am in the market for a bike that will be used to commute to work (150 miles round trip). I would love to get a nice sport touring like a Yamaha FJR1300A, but the budget won't allow it (and I'm not ready to jump on that large a bike just yet)
Because I will be riding long distance, I'd like to have a comfortable riding position, rather than laid out like a super sport bike. Plus, I'm 49 and can't see me riding a rocket like that

So, I've found two bikes that I like and will be looking closely at:
1) Suzuki GS500F; I found a dealer that has two 2009s left for $3750. Seems like a very good deal.
2) Kawasaki Ninja 500R: Best deal I could find is $4599.
Now, the only real difference that I could find is that the Ninja has liquid cooling and Suzuki is air. Neither are fuel injected.
Questions:
1) Are there any significant differences between the two? Is one better, etc?
2) Is there a big difference between the liguid cooling and aid cooling? Should that be a "deal breaker" as to which one I choose?
3) Should I pony up the money and get a little bigger bike so that I can get fuel injection? Is it a difference that I will notice? I would rather have it, but I will probably move up to a bigger touring in a few years anyway (assuming the wife will ride with me

Thanks for any input!!