Looks good, heres a few suggestions/questions though:
1. If you've got the raptors you might as well put them in RAID (redundant array of indexpensive discs) 0, so its splits the data between the two resulting in better performance. I've got my raptors in RAID, if I got to do it again though I'd of not gotten raptors and saved the extra money, buying a 200 gb hard drive instead.
2. Why did you buy on ethernet card? The motherboard already has one on it, you dont need that card. Don't put it in it will just hamper airflow.
3. Very nice ram, that kind is good for overclocking I believe do you plan on doing it? If you dont plan on overclocking you could have saved the cash and bought valueram probably. In the future you might want to get an extra gig at one point, even though 1 gb is pretty nice for now.
Everything else looks very nice, good choice of video card the 7800 gt is a very good price/performace card.