Wifi is still not great for doing things... i'm afraid. but seems reasonable that you could put something together.
2.1 or better yet 3.1, at least. If you want great low end, maybe 2 subs. Its real easy to drive the cost up!
Definitely gotta give us some specs though... room size, volumetric is ideal (how much open space would a Sub be exposed to), as well as linear (how far from the speakers you might sit).
Do you do music too?
Do you have anything right now? AVR, Speakers, TV...
