Getting a new pc, need advice on the hardware

I'm getting a new machine and i have some questions. This is the processor i'm going to get: Intel E6700 dual core 2.66Ghz. I need to pick out the motherboard, i'm thinking of getting one of these:

ASUS P5N32-SLI Premium nforce 590 SLI

ASUS P5N32-E SLI nforce 680i SLI

ASUS Striker Extreme nforce 680i SLI

eVGA nForce 680i SLI

BFG nforce 680i SLI

Most of the parts i'm considering are certified by Nvidia for SLI mode, i'd like to keep it that way so there would be no surprises later on. The 2nd and 3rd motherboards are not on Nvidia's list of certified parts, however, i'm quite tempted to get an Asus nforce 680i board only because its hard to go wrong with ASUS. Any thoughts here?

Next thing, memory, i'm considering these 2:
CORSAIR, 2GB (2 x 1GB) XMS2 Dominator PC2-6400 DDR2 800MHz
OR
CORSAIR, 2GB (2 x 1GB) XMS2 Dominator PC2-8500 DDR2 1066MHz

Both are also certified by Nvidia for SLI, I'm thinking of going with the latter option. the PC2-8500 is a better match for nforce 680i boards so thats why this question is tied with the first.

And finally, the video cards. I'm basically stuck between 2 options here. Either get a PNY GeForce7950 GT 512MB (the only 7950 GT card certified by Nvidia)
OR
An Asus, BFG, XFX or eVGA geforce 8800 GTS 640 MB. I''m not even considering an 8800 GTX, since i wont have the cash to get it. Even though i'm getting this rig as b-day present from my parents their financial resources are not infinite. For now i'll get only card, several moths down the road i'll get a second one when i have more money and go SLI.

So i need some advice here, i'm especially eager to hear from folkswho have some or all these components in their machines and have first hand experience.