I usually use my headphones on my pc, but I'm considering buying a cheap set of speakers, perhaps 5.1. I also have an old stereo system, a Sony 100w mini stereo which no longer works. The speakers should work though, and I'm wondering what I would need to connect them to my PC, and whether or not it would be worth it to keep them over say a $40 logitech 5.1 set. Thanks.