its not that its not enough, its just that first of all the OCZ has many good reviews. and u never now with the upgrades and stuff, especially all the new techs that are coming out these days. and Also you shouldn't really cheap out on a PSU, although it says its 500W, a lot of PSU either burn out quickly, and when that happens u just wasted all ur money. That is much more likey to happen with a PSU thats built into a case. I strongly suggest that you go with a seperate PSU, the one i suggested above has many good reviews and should hold you tight for a while.
Also, if you have the dough, and IF you are going to Overclock i suggest you go with an Opteron 165, if you do overclock you can get it way higher than the x2 3800+, some ppl get it 2 3GHZ, 003 got it to 2.85GHz and thats ONLY with air cooling. so think about it.
hope i helped.