I have a sound blaster z soundcard. I would like to get a 5.1 channel speaker system. I would like to have the speaker system working for my cable box, xbox, and bluray player as well. I am currently using the tv speakers for everything. Should I get a simple plug and play 5.1 set from a brand like logitech that connects directly to my soundcard(and if I do this will I be able to use it for my other appliances), or should I get a 5.1 av receiver and speakers separately. I'd like to make it clear that I would really like the best possible quality. My soundcard has three 3.5mm connections for 5.1 speakers, and also toslink spdif in and out connections. I don't exactly understand how I would go about connecting all of my speakers and devices, so as much information as possible would be greatly appreciated. I don't really have an idea of how much a system would cost, but I guess I'd be willing to spend up to about $600, maybe more if it's worth it. Thank you for taking the time to help me out if you can.