One of the most incredible new PCs I saw at COMDEX this week was HP's new limited-edition Compaq X Gaming System, an aluminum-clad monster that competes directly with Dell's equally impressive Dimension XPS system. The Compaq X features a 3.2GHz or 3.0GHz Pentium 4 processor, 512MB to 1GB of RAM, serial ATA hard disks, and multiple optical drives. The gaming crowd should be sure to check out the system's neat internal lighting effects. HP uses the aluminum case for practical purposes, too: The case aides in heat dissipation, along with four strategically placed fans. The Compaq X will be available in limited quantities at certain Best Buy and CompUSA locations.