I love the v710's. Used them for the first time this past event. The car pulled like mad and acted like it had a limited slip. I was able to get on the gas waaaaay earlier than the 700's. It took two shops to mount them, but they are awsome. 215x40x16 on stock xlite rims.

I was using V700's before this. They lasted almost 2 seasons, including an evo school (maybe 150 runs total) They were pretty cooked by the end, and weren't much better grip than street tires, just cheaper. They were good, but would get greasy if overheated.