2x Optical Drive: Asus - $70 ($35ea)
1x Case: Antec 1200 - $165
2x HDD: Samsung Spinpoint F1 500GB - $140 ($70ea)
1x Graphics Card: Sapphire HD4870X2 - $550
1x PSU: PC Power & Cooling 750W - $145
1x RAM: OCZ Reaper HPC Edition 4GB(2x2GB) 800MHz - $85
1x MOBO: Asus Rampage Formula - $290
1x HSF: Xigmatek HDT - $35
1x CPU: Intel C2Q Q9550 Yorkfield - $330
I agree with most of what Joga recommends, but I would change a few things if it was my money.
1. The 500GB Spinpoints have 16MB buffer, the 750GB/1TB drives have 32MB. Single drive vs single drive, the 750GB and the 1TB would be slightly faster. But I'm guessing the idea is to put them together in a RAID 0 configuration? That depends on whether the OP wants to risk the zero fault tolerance and the extra cost of a decent controller etc. The only real performance boost with RAID 0 is write speeds. So I would probably go with the easier 1TB Spinpoint F1
2. @ OP, are you overclocking? If not, then there's really no point in spending so much on such a great OC'ing board or highly overclockable RAM if you won't make use of it. You could save a lot by paying only for what you need. Just a simple P35 board
would be sufficient for somebody who isn't overclocking. Or there is the P5E
if you want the Crossfire upgrade path later on.
3. Unless you want to copy DVDs all day, spending $70 on optical drives is pointless.