It might be too late to recommend a sound system, but I would buy the Onkyo HT-S9400THX
7.1-channel THX certified 3D capable home theater system.
It's a great system for those who don't want to spend the time building a home theater piece by piece. With this system you don't have to do anything to have great sound. Watching movies feel better than a movie theater. Music sounds great too.
One thing to consider is the fact that it includes seven relatively big speakers and one subwoofer, but it's worth it.
The price is right too, under $700.00. It's selling for $600.00 used.