Saw an interesting chart when talking with the dealer last weekend.
Power Pilot - 90% street, 10% track
2CT - 85% street, 15% track
Power Pure - 80% street, 20% track
I personally like michelins. everyone has their favorites though. I'm running a power one, power race combo right now and they hold great for my superhawk. I'm only middle of the road "I" pace though.