To begin with, I just purchased a set of Logitech Z-560 4.1 speakers. I know jack shit about computers and I need your help. My computer, an HP Pavilion 750n (pathetic, but it works ) came with an integrated sound card with 3 connectors (line in, line out, and microphone). My speakers have yet to come in so I do not know what type of connectors it needs. What I want to know is if I need to upgrade my sound card in order to use the speakers and if I can upgrade my soundcard when I already have an integrated one. If I need to upgrade my card, please recommend me one around the $30 price range.