Sounds like you need some speakers. and from one neophyte to another, let me help as I did a ton of research and listening and decided that I liked the Klipsch speakers the best.
Doesn't mean they're the best, I just liked them compared to Polk, KEF, Infinity, and Boston Acoustics.
I got mine on sale, and openbox deals on the following Klipsch models:
RB-25 (books)
RC-35 (center)
RW-10 (sub)
got it all for about a grand and am going to eventually get some satellites.
I've never had a theater setup, and am now hooked on the whole scene. Its amazing how better the viewing experience is, especially with a booming sub, and I almost want to go rewatch movies just to experiece them in all their glory.