Looks like a good build however I would recommend to wait for AMDs socket AM2 which should be coming out in the next few months or at least by summer. These new boards will also support DDR2 so you will want to change that Ram as well. On a personal preferance a Lian Li case would own that antec. For montior id run over to dell.com and check out there 20" widescreen I think its 2005FPW or something close that thing rocks. Otherwise that thing looks good
