I like the Yokohama AVS ES 100 for a value high performance summer tire. I also like the Toyo Proxes T1-S. For the money, I don't think you can do better. The Yokos will last longer, the Toyos perform a bit better, in my experience. (40k on ES100s on my TL and 325i, 20k on T1-S on the NSX)
If you want to go all out, I like the S0-3 and the P-Zero.