I'm going to buy the following within the next week for my street tires. My track tires are Toyo RA-1. I use 225/50/16 on the front and 25/45/16 on the rear for both the track and street.

Kumho Ecsta Supra 712
Soft tread, stiff sidewall and a high wear rating

If I were to want to spend a more money, I go with the Bridgestone S03. But, I can go through nearly two sets of Kumho for the price of one set of S03.