i have the e30m3. i currently run kumhos and i like them. i havent tried anything else so i dont know what would be better. i currently run 225/50 15 on 15x7 wheels. i thought about the k1s 15x8s, but i plan to upgrade to a big brake kit. meaning i have to run a true 16inch wheel or play safe and go with 17inch wheels. what would be really good for the track, light and not too expensive? thanks franklin