Go with the 6790 instead of the 550 Ti. http://www.newegg.com/Product/Product.aspx?Item=N82E16814161377
Better performance similar price plus you'll be able to Crossfire in the future as most ATX boards that have 2 PCIe slots support Crossfire from the AMD chipset as opposed to SLI.
Agree on the video card. You understand that the Phenom II you're looking at from Newegg is OEM, meaning it does not have a warranty beyond 30 days (vs boxed processors which have 3 year warranties). My advice is to spend the extra 10 dollars and get the Phenom II 965 Boxed Processor from newegg instead.