Sorry but there are so many.
Okay, so my setup is currently a 23" LG LCD monitor connected to my xbox 360 with a HDMI cord. Since the PC monitor does not have speakers like a TV would, I need an alternate way of getting sound. It seems that the only current possible way would be to plug in my RCA cables into my 360 and then use the Red/White audio cables from that and plug them into a set of speakers. BUT the new x-box 360 slim won't allow me to plug in both the HDMI cable and the RCA cable into the 360 at the same time. So now im really screwed but if there was a gaming Headset that I would use maybe that connects via USB to the 360 that would be awesome. Maybe tell me how the connections would work?
Thanks.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic