Looks like a good setup to me. A couple thoughts though.
1. The case of a system is highly subject to personal preference. While that $120 case is very nice, you could spend $50-60 on one, and it wouldn't affect your system performance. I would do a little shopping around in this category, so to speak. Try to find one that you like the looks of, has sufficient cooling, features you're fine with, enough room for your components, etc. If you don't really care, that case will do great, but you could also save money to put towards other components. Do you plan on overclocking?
2. The processor. That 1055t Phenom 2 is a great processor, but you could eke just a little more performance for gaming out of a higher-clocked 6-core or a nice Phenom 2 quad-core. You'll be happy no matter what you pick, but just something to consider. You could stay with a 6-core and opt for the 1090T, at 3.2Ghz for $20 more. Or you could go the X4 route, a good example being the 965 Black Edition, 3.4Ghz for only $160. Again, any of these you choose will be great. The main deciding factors should be your budget, whether you want a 6-core processor or if a 4-core is fine with you, and whether you plan to overclock.
3. The memory. It looked like the list only had 4GB of memory. 4GB will do fine for most games, and probably anything else you plan to do with your system, but memory is so cheap that you could easily afford to go with 8GB. Especially considering the fact that you would like this computer to last a good 2-3 years and you plan to game. As it is now, 4GB is essentially the minimum to have if you're building any sort of gaming system. As I understand it (but i'm no expert), there are a few games out now where its good to have more than 4GB.