Since you have gaming listed first I will point out the fact that there will be new intel sockets next year. You will have to buy a new motherboard again when you upgrade next.
If you went AMD you should be able to do a drop in upgrade later. I would suggest using a phenom II 955 which would be basically identical as far as gaming goes. You could also go for one of the six cores.
Other than that I'll suggest a samsung spinpoint F3 for a hard drive instead of that one. This one should be faster.
Besides that stuff and the RAM thing Silvune mentioned, that'd be it.