This what I am thinking about at the moment.
Seagate Barracuda 7200.10 250GB SATA2 8.5MS 7200RPM 16MB Cache $60
Intel Core 2 Duo E6550 Conroe 2.33GHz 4M shared L2 $180
PALiT NE/960TSX0252 GeForce 9600GT 512MB 256-bit GDDR3 SLi - $210
GIGABYTE GA-EP35-DS3P LGA 775 Intel P35 ATX - $155
G.SKILL 4GB(4 x 1GB) 240-Pin DDR2 SDRAM DDR2 800 $110
Ultra Black MicroFly Aluminum Micro ATX Tower Case with Clear Sides, Front USB, FireWire and Audio Ports and Ultra V-Series 400-Watt Power Supply $85
This totals $800 right now. I could start to downgrade some stuff, but what am I gonig to shave off ? $150 to $200 then have some thing that I can't greet with a smile e in the morning ?
I am tempted for an extra $50 to go to the E8400 Wolfdale CPU.
Is the case OK ? Will everything fit ? Will it cool ok ? Is the power enough ?
This will all run on Linux, if I decided to go that way ?
Where is the cheapest place to get a 64 bit version of vista ?
I am sure that I am configuring way more than I need, but like I say, when I go downwards the difference between good and cheap is not a whole lot of money.