I'm thinking about doing some racing next season, but I'm not sure what to race. I've been riding a long time, but have never raced or even done a track day. I'd like to get into something simple to maintain & somewhat inexpensive (oxymoron for racing). I'd like be somewhat competitive, but I'm 28, can't devote all my time to it, and don't have any pipe dreams of world domination. I'm basically looking to have a good time, learn racing, and challenge myself. I've gotten suggestions of CBR's, SV650's, 250 class. Anyone have any ideas for a beginner?