Defiantly tirerack.com you can read user reviews and manufacturer reviews, testing and what not. great source of info even if you don't buy the tires from them. Also I bought Pirelli scorpians (ATX or STX, cant remember off the top of my head) for my minivan and got maybe 15,000 miles out of them before they were almost bald. They have a real soft compound. Also I put Nexen N7000 on my Cobalt last spring and I'll be lucky to make it through the summer with them. Low profiles (performance tires) don't give ya much of a milage warranty so shop around and read the reviews. With these kinds of tires it seems hard to find a balance between performance and wear. just my .02.