I think Tirerack has a rebate going on right now for the Hankook Ventu Evos
Hankook****Ventus V12 evo K110 S&autoModClar=
For my boxster it would be $350 for a set of 4, only $20 more than the Sumitomos.
I still have a ways to go before I am ready for new tires, but it if there is a rebate going and I may try something new. If no rebate, then I will get 4 more Sumitomos. And sometimes they have a $50 rebate on those.