Sound bar option.
My sister bought a passive 'sound bar' with sub-woofer system for her new LED TV which is attached to her surround sound receiver. She didn't want her new home cluttered with speakers and speaker wires. Self-powered sound bars don't need to be attached to a surround sound amplifier. Non-powered (passive) sound bars need to be attached to a surround sound amplifier.
The sound quality is very good, but not as good as a 5.1 surround system with speakers located around the room.
The price range varies greatly.
Example of a powered sound bar with sub-woofer:
