The Eurocom D900C Phantom ($5,000 direct) takes the term "desktop replacement" further than most laptops. It houses a desktop processor, the Intel Core 2 Duo X6800 Extreme Edition, and dual nVidia GeForce Go 7950GTX graphics boards arranged in SLI configuration. Its scores on our performance benchmark tests went through the roof. But before you get trigger-happy on the company's Web site, be prepared to buy a set of noise-cancellation headphones to offset the four loud fans, and find someone with a strong back to carry the Phantom's considerable heft.