A better HTPC video card ,Pure Video 1 vs 2

Just my luck but I now have 2 EVGA video cards. An 8600GTS superclocked and a 8800GS superclocked. From the standpoint of
picture quality, the abilty to go to 1080p Which of the two should I hold on to. I suppose both would do HDMI with an adapter in the DVI slot and I wonder how to handle the audio. They are going to a matx
Evga mobo 630i with 7150 gpu. Any opinions are appreciated.

im sure that the 8800gs has better performance than the 8600gts. well you can get one of those adapters from dvi to hdmi. but know this that the video can only be transferred through the card. you have to run a seperate audio from the system. i only know of ati card from the 2xxx and 3xxx series that have both sound and video through hdmi right on the card. if you get a cheap ati card for like 50 bucks, with those dvi/hdmi adapeters in the package, you would be set. but you can't do that with the current card. video and audio are seperate.