CBR 600 is an exellent choise. It´s easy to handle, and the more you learn to drive it, the more it gives back to you. In 2000 I bought a -93 CBR 600 and I have been riding it both on the street and racetrack, it still impresses me. 70.000 km and never enything wrong. (If my english is funny please excuse me, I´m from Norway)