If you're on the hunt for a new pre-built powerhouse system, they dont get much better than what Alienware has to offer (also providing funds arnt much of an objection). Their latest masterpiece makes use of Intel's newly released flagship processor, the 65nm 955 Extreme Edition. The system comes with some pretty crazy upgrade options too (and not surprisingly so from the Alienware mob).

Further details can be read over at Toms Hardware, and also the official product page folks.

A system equipped with the 3.4 GHz processor will ring in at least at just above $2600 for a basic system with a GeForce 7800 GT graphics card, 1 GB of memory and an 80 GB hard drive. Step up to the ALX series and you are looking at slightly more than $4400 for the entry level model.