Don't knock the Ninja 250. After 20 years on Honda V-Fours like the V-65 Magna, Sabre, ST1100 and ST1300 and finally the GSA, I picked up a 2004 Ninja 250 for $800. You can fling that bike around with the best of them. Nice thing is when a 600 blows by you in the straightaway, sure , he may beat you to the corner but he has to start braking for the corner sooner. That is when you can catch up to him (unless he's Ben Spies). On the 250 in the corners you can usually keep the throttle pinned and pass the bastard. The plus side, they are easy to maintain and repair, and don't break your budget if you toss it into a ditch or crack up at a track day.