...good for my new Logitech Z-5500? Would an external surround sound card be good for my new Logitech Z-5500. The problem is that i can only plug in 1 cable at a time it has a green, pink, and black one and each of them work with different sets of speakers so i can only listen to either the front the back or the center set, so i was wondering if an external sound card has enough holes for the rest of the plugs or should i buy a normal surround sound card... if so which 1 is a cheap decent 1.