Have one of these on the TV in the spare bedroom
http://www.amazon.com/Yamaha-YHT-S40...amaha+soundbar
Improved the sound of the TV but NOT surround sound
Has HDMI switching
Cost 599.95
If your not picky about sound quality you can find much cheaper sound bars
I agree with LasciviousXXX on the sonos for wireless
Really depends on what your looking to do. You can get a AV receiver and simple 5.1 speaker set up for the price of a decent sound bar and get true surround sound.