This is what I would get:
ASUS P8P67 PRO
G skill 8GB CL9 1.5v
KEEP the 212+, it's an awesome cooler and it performs very well!!!
Now this is where it gets a little tricky, if your gaming at 1080p and aint looking to go further, then the 570 is more than enough, however as you said your planning to go SLI in future then I would say get the GTX 580 1.5gb now. If you was to get the 580 1.5gb now then you would need a 850w PSU so that you can run SLI and overclock the hell out of them.
That I think would be a better option because you said main usage would be gaming, then it makes sense to maybe skimp out on things that you don't really need, ie. z68 mobo, i7 2600k, that particular PSU, cooler (because your 212+ is more actually very good!!) and spend a little more on the GPU for that extra VRAM and performance over the 570.
There you go, all these saving and you could definitely get a 580.
Here's a Quality 850w PSU that will run 580s like a dream!!XFX Core Edition PRO850W $90 after MIR
If you wana save some money with the GTX 580s, Newegg sometimes has open box items and 580's go for really cheap, alternativly you could even pick up two from the F/S section here for a good price.
You have soooo many options. Edited by munaim1 - 8/7/11 at 9:04pm