How to set up home theatre system w/ computer

[wasamicron]

Well, had a bit of bad luck w/ lightning storm that fried my stereo, dvd player, and computer speakers. Want to replace w/ a home theatre system. Would like to hook my computer up to system to play mp3's. Have Soundblaster Live card. Not sure how to do this. Haven't yet purchased home theatre, but will probably get from Bestbuy or Ultimate Electronics. Any tips or suggestions on how to install or what to buy would be appreciated.