Perpetual

I've all but pulled the trigger on Arma 2 CO, and the last thing i need to do is get the sound situation taken care of. Looking for some players input. What kind of setup do you prefer? headphones vs speakers, what mic setup and why etc. I think I'd prefer to get a mic to use with my 5.1 system. Any recommendations?

Hey Arma 2 community, After playing the demo and reading guides I'm looking to get into this game. CO is available for $30 from amazon digital downloads. I'm apprehensive as I can't find any solid information as to what the issues/limitations are when buying from this service. Has anyone gone this route? http://www.amazon.com/ArmA2-Combined-Operations-Game-Download/dp/B003UV8RRE/ref=sr_1_3?ie=UTF8&s=videogames&qid=1292475455&sr=1-3