Build - Costs less.
CPU - Intel, Core i7.
RAM - 4 GB Minimum, 12 GB Maximum.
HDD - 1.5 TB, 7200 RPM.
Motherboard - ASUS P6T Deluxe LGA 1366 (socket)
Video Card - ASUS ATi Radeon HD 5870 (1 GB)
Sound Cards - Motherboard will have a sound card integrated.
Case - Antec Nine Hundred Two case - Has a good amount of space and airflow
Power Supply - 750 Watt CORSAIR, so that you have enough power for now and the future upgrades.
Disk Drives - DVD+RW drive, unless you plan on burning Blu-Ray's. DVD+RW drives should only cost about $30.
Needed Tools - Philips and Flathead screwdrivers, that's about it.
Sites - TigerDirect and Newegg