dybowski,
r u planning on overclocking? if so, i likk ur lanparty mobo, but if not, i wuld suggest a slightly lower priced sli mobo that wuld work just fine. Also, the bottleneck in this system is the processor. it WILL work well, but it is an older technology that will bring u down a bit in overall computer performance. i have no experience with the 6800gs, but i wuld recommend possibly shelling out a bit more money for a more advanced 7800.
bottom line, sacrificing a good mobo for a better cpu wuld b a good option if ur not planning to overclock
the video card shuld b fine, but if u really wanted a good performance, a 7800 wuld get the job done everything else looks good. WD hd is good, great hd makers
l8r