Hey whats up Shadow, welcome to the forums
I'm running my my tv/computer/xbox and ps2 through my logitech Z680s... not too shabby for the $220 bucks I paid like 2 years ago, only bother is that I have to switch between the ps2 and xbox optical cables depending on which i use (no $ to buy a optical switcher).
They have an updated version of the Z680s which are the Logitech Z-5500 5.1 Speaker... they can be found for under $250 as well. Check out
www.newegg.com It's a pretty good solution for cheap. The Klipsch systems are also pretty cool, but cost a little bit more.
And if you have more money... then you can buy separate components and run your audio/video through your system just like BMXTRIX says... can't wait until I save up enough money for that
For now the z680s are doing fine for a grad student budget