alphaxxn... My advice would be to buy/borrow a beater to take on H-stock. As rick mentioned, most of us regular racers(well, probably all) recommend starting off in a stock class. If you plan to be competitive, it will probably be years before your even close in SM, and thats assuming you've got a top notch suspension and alignment.

Twin3037... why the heck did you buy tires specifically for autocross if youre "just wondering if you want to get into it"? The best way to check it out is to go to your first (several) autocrosses in your car exactly how it is on the road. Don't worry about being competitive, you wont be. No point in buying tires (or anything for that matter) unless you've been at it for long enough to know what your car needs.