i've done well on my Pzero,s but thats a street class tire.
I love the new advan/yokohama a048's, but you have to have a 225-45-17 or 18" porshe sizing to get them right now...A032R"s are being slowly fazed out it seems, and availability is an issue, for autocross the soft compound is the best option, for track use, the ahrd compound will work better over the long run(after 2 laps, better heat characteristics, etc)
I'm going to be putting some new tires on my car shortly, but as its a street car(used for mild autocrossing, etc right now) it's getting one of 3 tires:-KD bfgoodrich G-0force-Pilot sport 2 michelins-Yokohama A048R(if I hit the lottery and dont drive in the rain...I got a little truck for that..hah)
smith, hit me up online we can bounce ideas and such back and forth

-chet