Hey there guys im trying to build a gaming computer from the ground up that can run Skyrim and BF3 at full settings (and Mass Effect 3 when its released). My budget is $1000. I am kind of new to this whole computer building stuff so be easy on me
at this price tag you can either let overclocking go and aim for the i3 2100 with a decent gen3 mobo letting you upgrade to ivy+pci-e gpu in the future with a couple of 6850 or 6870 to start with (or 460 if you prefer nvidia). In this case you aim for a 750-850 watt quality psu just to be sure. 4-8giga of ram, crippled ssd 30-60giga, stock cooler (or the cheapo CM TX3-your i3 wont really need it) a trusty seagate barracuda 7200.12 500gb-1tb and all this in any budget case that will offer you 2 case fans (and a backplate window).
You can drop the dual gpu, get any nice Z68 mobo (Asrock extreme3 gen3 i have found to be excellent bang for buck and a powerful overclocker) i5 2500k. The cooler can range from CM 212 to Xigmatek Aegir (about 20$ apart) the rest pretty much the same just the GPU can go up to 6950, see what your money can buy. Think on it, post here and perhaps we can work out details when you have already settled on precise budget with some parts you like and then we can debate on weather for the same or similar money you could get something better (always in comparison to how the fit together and potential bottlenecking of one another)