This sunday there is going to be racing at 106 Race Park, a few miles away from NHMS/NHIS. If you've got some time, head over and check it out. You'll be able to see a large variety of machines, talk to riders, and watch them throw down on a nice technical road course.
Evil Empire Racing
Once you sniff/sit on/hump a couple machines you'll have a better idea of what you'll want and how much it'll cost to get there.