It has your choice of SLI or CrossFire as well as your choice of Core 2 Quad or Core 2 Extreme. It runs on the nForce 650i SLI chipset based board and can hold up to 4GB of DDR2.
You can get up to 1TB of HDD storage, an optional Blu-Ray Drive and AGEIA PhysX card. There are 6 USB 2.0 ports, a 19-in-one card reader, gigabit Ethernet, FireWire, audio in and out, and a pair of PS/2 ports.
Technically it’s a pre-fab system, but it has the Enthusiast System Architecture built in like non-pre-fab systems. Base price is $1249 and goes up quickly from there.