I'm a fan of the Yamaha series of sound bars. I use one in my main video system due to room constraints, and it gets you about 80% of the way to a full surround system. The built in calibration routines make it easy to set up. It does work better with an external sub, but is OK on its own.
http://www.yamaha.com/yec/products/productdetail.html?CNTID=556970
http://www.yamaha.com/yec/products/productdetail.html?CNTID=556970