Drew, what are you looking for? Ultra-high performance, high performance, dry weather only, all-season? Will these be on year-round or just summer? Are you opposed to directionals?
I've had Dunlop DZ101 Direzza, Yokohama AVID Envigor, and Continental Extreme DW. Looking back, I liked the Dunlop best. The Yokohama are quieter and softer but they're directional.
We all know Michelin are the best but they're pricey. Believe it or not I've heard wonderful things about General Altimax HP as well. Tirerack is also usually the cheapest place online.