I was pondering this the other day and i've had my klipsch 4.1 400w speakers for a long time now and i still love them. they're still a good sounding speaker set and i dont want to spend 500 dollars on a new speaker system when these are perfectly fine. What i'm wondering is, if there is some way to upgrade the klipsch system to include a center speaker to take advantage of 5.1 surround sound instead of the 4.1 i've been using. I believe that my sound card has another speaker jack for center/subwoofer. Would it be as easy as just getting a center channel speaker and plugging it into that port on the back of the sound card and changing my speaker configuration to 5.1 in windows? seems easy enough... But it cant be that easy is it? Any suggestions?