Believe it or not, Gateway makes some pretty good machines these days. $1299 gets you some pretty substantial improvements over the specs you listed (memory, drive, HUGE improvement on the video card):




I'm liking mine quite a bit - it's REALLY quiet, handles 5boxing extremely well, and any other games I've thrown at it. The only updates I'm making are the installation of an SSD for the OS and game installs, and possibly 8GB more RAM once the prices on memory drop a bit.