i will make 3 suggestions.
replace the mobo with this one. its not that the g43 is terrible, but the asrock extreme3 has z68 features, a better layout, pci-e 3.0, includes an sli bridge, its cooler looking, and its slightly cheaper:http://www.newegg.com/Product/Product.aspx?Item=N82E16813157271
get 1600mhz ram. while the performance difference is very small, the price difference is too
get a 750w psu if you want to SLI. http://www.newegg.com/Product/ComboDealDetails.aspx?ItemList=Combo.730392
personally im not in love with the case but it will function just fine.