necessity is always a personal thing. a superstar's lifestlye may neccessitate a ferrari, but a 'normal' person's do not.

when looking at multichanel systems, you must always remember: not all games or movies support multichannel. music is meant to be played on stereo and not multichannel, unless of course we're talking about dvd audio.

well then, now i do not see any reason whatsoever to get a PMU5.1

well, ive never listenend to the PSC805 before but the av710 is a very very warm card. i think it should fit the gmx.

[anyway, if you guys werent turned off by the brightness of the speakers i dont think warmth matters that much ]