You game with an x34 and the onboard speakers ?
Is that a problem? For me the sound is secondary to the visuals. Do you watch Star Wars on a TV? Same thing. We could have a home theatre surround setup (I do), but most of the time it's just standard TV speakers - time and family don't allow much more.
I actually forget about the sound after a while, it does its job for games and I don't need anything more.