If you actually want to be competitive at autocrosses you will need a non-street friendly alignment (with lots of negative camber), a set of R-compound tires and lots of seat time. This means you need a second set of rims and have to consider your autoX tires as just another consumable, like gasoline.
If you just want to go have fun, get to know your car and explore it limits, then almost any decent and predictable tire will serve, but you won't be getting a prize for FTD. I don't put huge stock in treadwear numbers I have Conti DW tires; they are good tires with good grip and I wouldn't consider tread wear a problem with them. I did get almost 40,000 miles out of my last set of Toyo, T1Rs, though with less grip than the Contis
Last edited by jornahow; 06-20-2013 at 10:58 AM.