the wirral 100 and aintree where i race has a good even mix of vfr/rvf/fzr/zxr, then a few cbr, and maybe one gsxr!
they all win. well apart form the gsxr.
depend what you like. i race a zxr, for no reason, other than they where for sale when i wanted one. I originally fancied a fzr.
Im told the rvf/vfr handle like nothing else, the fzr have amazing pace(kaboom!), and can run +1 pistons legit in f400, and the zxr's are a bit more competetive standard, and they only stopped making them 6 or 7 years ago...so parts are probs better.
dunno about the cbr, but it won the tt a few times i think..
buy yaself a racebike mate, dont go the expensive roadbike conversion. seen this here?
http://www.motoforum.net/index.php?showtopic=28685
good price that