be careful with auto-x tires if youre driving on the street- they heat up waaaay too much (designed to heat up immediately during a run, not for continuous use). The R6's are scary slippery in the rain, as they take about 2 laps at sebring to start creating any grip at all (ask flatrex about me in a 951 about to lose control, my job, and my lunch all at once in the rain a couple years back). I have heard many good things about the v710s as an all around sneaker.