You guys are overlooking a great beginners bike, the Buell 1125R. Lots of torque and enough HP to be exciting. I can stay with the 1098's on a straight. Handles great. The '08s are as low as <$10K now with easy financing. Of course I have one that is used only on the track. My first race, last week, I was in the Beginner class. One of the more experienced guys on a 600 pulled up next to me on the short straight. I looked over at him, down shifted and pulled away. The bike is a lot better than me, but it also takes care of me. My biggest challenge so far is throttle control. The track I visit, Arroyo Seco, is very technical. It's easy to spin the tire with too much throttle. That is my only problem. Although I did get a GPR damper, you could go without it.
I better comment on the early problems they had with the 1125. All bikes now are delivered with all recalls done. The only other issue is to buy an intake solenoid replacement piece for $6.00.
Oh yah, I've also learned not to up shift with the clutch cause that makes the front come off the ground. The trans is so smooth.