generally servers/server ram isn't good for gaming... and AM2 FX-62 would be better choice, because No.1: it is far better and far more overclockable then the Socket 940 Opterons, and it uses DDR2 (and also AM2 & DDR2 means that it will have a MUCH larger room for upgrading...)
There is no speaker system that is better then KLIPSCH ULTRA 2 THX SYSTEM ...
That motherboard does not support SLI, so putting that graphics card in SLI wouldnt work out to great...
The monitors you picked out have a worse max resolution then my old 17" CRT... the Dell Monitors are the supreme... the harddrive configureation is nice, but isn't needed, so it would be better to scrap that plan and just get better cooling and overclock the hell out of an FX-62 to perhaps 3.8GHz? it would probably perform better then the opterons pretty soon after u start rasing the clock speeds... that computer case... eh, it doesn't have quite the cooling features of the stacker... but its really a matter of opinion...
and i think you also might have some conflicts with how many PCI slots are availible with that setup...
ideally my setup would perform better (from the computer to the monitor and the kickass speakers)
you took alot from the computer's enviroment (speakers & monitor) and made the computer have primarily a crapload of unnessesary ram...
also would there be compatibiliy issues with a server/vista?
cheers