[bleucamaro]

My vote for autocross setup is a 16"x9" all the way around, or the smallest and lightest wheel that will clear your brakes. The reason is lower unsprung weight allows your suspension to do its job that much better. Hoosier and Kumho have some pretty decent auto-x tires out there, basically 2 groove slicks. Do some searching on tirerack.com and see what people think of the different tires. Also see which sizes have the lowest tire prices and greatest availability. 275/40-17 seems to be pretty popular. Also see what people recomend on more racing oriented forums, ie. corner-carvers etc.