I just ordered:
Motherboard: Asus P8P67 Pro, Rev 3.0, LGA1155, Intel P67, DDR3, USB
Graphics card(2 of these): Palit GeForce GTX 570 Sonic, 1280MB GDDR5, 2xDVI/HDMI/D
CPU: Intel Core i5 2500K, LGA1155, 3.3 GHz, 6MB
RAM: G.Skill 8GB Dual Kit Ripjaws-X, DDR3 1600MHz, CL 8-8-8-24
Total cost was 1600 euros. They're building it for free, one less thing to worry about.
And some other stuff, I can't be arsed to copy paste unless you really want to know.
I highly recommend a 2500k or 2600k as a CPU, they're the best in the market atm, 2600k is a little better(nothing you'd notice). They can be overclocked like crazy.
With that budget I'd go with 8 RAM, just because it's cheap and future proofing is nice.
Also, I'd go with either a Z68 or P67 motherboard.
If getting 2 graphics card make sure it's cooled somehow. You don't want a computer meltdown the first month ;)
But, I'm not an expert. Better find someone who knows better