There are four things I'd look at changing:
1. The non-modular Corsair CX-500 was made using some inferior Samxon capacitors that do not like heat and are known for early failure. I would not put one in a gamer. The modular CX-500M, though made by the same company (CWT) for Corsair, uses all-Japanese capacitors and would be a safer and only slightly more expensive choice.
2. Like many other CM products, the sickleflow fans were found by Anandtech to have liar labels on them for the amount of air they move. Iirc, Corsair and Enermax had better fans.
3. A few more dollars will buy a dual-band N wireless adapter, which will likely be a little more reliable and faster, especially if you use a dual-band router with it.
4. I agree with AMDRadeonHD, either wait for Windows 8.1 or just get Windows 7.