The Bridgestone RE-01R is probably the best Street-Tire class autocross tire out right now. They are in the same category as the Dunlop Z1 Star Spec, Kumho XS, Falken RT-615, and Hankook Z212 R-S2.
I understand that the Kumho XS are supposed to be as good, if not better than the RE-01R's. The RE01R are more expensive than the XS but I hear they tend to last longer. The RS2's are supposed to be very good in the wet, but have the least dry grip. They are very reasonably priced though.
I've only driven the falkens and dunlops, but I like the dunlops. Better overall grip, though they did not take well to being overheated as well as the 615's. I'm pretty sure the dunlops lasted longer too. They're also better in the rain and seem to be a bit less noisy (neither of which you should be incredibly concerned about in a 7).