the mobo is low-end-ish... looks like it doesn't support DDR2 800 PC6400 ram.. it says DDR2 667. also, it doesn't look like it supports RAID (only a problem if you plan on using raid..)
but overall, no significant flaws in your build.. it looks pretty solid. the powersupply seems a bit overpriced.. you can probably get similar performance for a good $20 cheaper. and as for video card... it doesn't look too bad.. but i would look elsewhere...
"Is virtue a thing remote? I wish to be virtuous, and lo! Virtue is at hand." -Confucius