Khumo's are pretty good. My buddy just got those exact tires on his RX-7 but I doubt they will last long. He has toyo proxies on the front and khumo's in the rear, the toyos are ready to be replaced.
This spring I am moving to 18" rims and toyo proxies 4. Should be silky on the freeway and handle a lot better than the Potenza's I have now.
