Well, that'll be your first decision then. If you have a decent TV that's not hooked up to a sound system (plus I know you watch a lot of movies), then the sound bar is absolutely your best option.
http://www.cnet.com/topics/speakers/...rs/sound-bars/
If you're just looking for a device to play your music or internet radio, then this site offers a good comparison in multiple price ranges:
http://www.cnet.com/topics/speakers/...-iphone-docks/
Can you tell I generally trust cnet?