Looking into building a new machine

I'll probably be buying a new machine at the end of the summer - a super high end gaming rig. Before I do this I have some questions that I'm hoping to get some help with.

1 - What's a good site for video card reviews? I would like to be able to compare the performance of a wide variety of higher end graphics cards with each other. I know of Tomshardware.com - but searching for reviews there is a pain in the ass. Are thre any other good sites?

2 - DDR vs DDR2? Can somebody explain the various levels of quality of RAM?

3 - AMD64 Dual Cores are the best for gaming ATM right?

4 - What's a good site for motherboard reviews? Tomshardware I guess?

I'll probably be shopping at this store - it's got the cheapest prices in Montreal (they're the closest to newegg.com prices that I can get in Montreal) - http://www.sigmawave.com/eng/main.aspx

Jam it back in, in the dark.

I wasn't planning on researching now, I was just hoping to get some info to help me do the research later. When is DDR3 coming out? Also, it is probable that I won't even upgrade my machine until the next generation of video cards comes out in six months or so. However, if I were to buy a system now it would probably be something like:

AMD65 Dual Core 4200+
2 Gigs DDR 400
Radeon X1900 XTX (or slightly less powerful, but much less expensive card)
Antec True Power 550W
Antec P180 Case
A8N-SLI PREM nForce4 SLI

I'd be salvaging my 120 GB and my 300 GB SATA drives from my current computer.

I might just end up buying this same system in a few months after the prices drop.

There's nowhere I can't reach.

I think that I'm just going to wait until Windows Vista is released before upgrading. By then, prices should be way down on the newer tech and I'll trule be able to build a good machine - the only question is will I purchase a legit version of Windows Vista?

This thing is sticky, and I don't like it. I don't appreciate it.

I'm pretty sure that all of the equipment comes with detailed instructions for setting it up - assuming you don't buy it OEM. If you don't trust yourself though, just get a shop to do it for you. They usually don't charge very much for assembly.

I am a dolphin, do you want me on your body?