So I've been playing Reach with no audio lately(on top of no vibration) and I find it has been much more enjoyable. There is too much unintended deception with the audio. Like your Spartan making blood curdling sounds despite being fine. Or a nade sounding like it has landed closer or farther than you've thought, hell even when it explodes and only manages a scratch on your shield you'd think your shield is blown out. That's not too say no audio doesn't have its own drawbacks but my experience has been good overall.