I just got into track riding this year and am pretty much addicted. I'm currently riding a naked standard bike (Suzuki Bandit 1200), but I think I want a race/track bike. My tentative plan is to do track days next season and race the season after that.

My budget is from $3,000 to $6,000. For the low end, I get to keep my Bandit for street riding. The high end requires selling it.

What to buy?

For reference, the Bandit is modded up to about 110hp and 85 ftlbs of torque, and I generally outrun 600cc sportbikes on the straights and out of the corners. (Note these 600's are being ridden by novices like myself) I like the power.

First question: 600, 750, or liter bike?

Second question: How old is too old?

Third: I hate carb's. Should I even consider a non-fuel injected bike?

Fourth: Is there a general brand preference?

Last: Is there some standard "best" first race bike that most people agree on? For example, I've heard lots of good thing about fuel injected R6's.

I know squat about this stuff, so any advice from you fast guys would be really appreciated.