Originally posted by Zyth
Quoted for emphasis - for instance, I have 2 7900gtxs in my rig, and at load, -each one- takes 150W. This means you need about a 650W power supply to make sure your system's running great. You probably won't need anything quite that big, but just check before hand.
Absolutely, do -not- skimp on the power supply.

If you'll be running 2 vid cards, plus a dual core processor and all accessories (all that RAM will not be power-light), you will need at least a 500 watt PS... Right now I've got a similar setup to what you're proposing (though I've only got 1 geforce 7800GT card and an athlon x64 3500), and I'm running a 550 watt PS.

Also, I've never trusted Seagate drives, I've always had problems with any that I've owned. I always use Western Digital (though, everyone will have their hardware preferences, it's just my opinion )

As for RAM, if you'll be using Vista you may want to seriously consider more than 2 GB.

OCZ is a good brand, though the XMS series that Corsair makes is a bit cheaper (and has faster timing), as well as the stuff made by Patriot .