I had a similar issue with sound on account of the fact that I don't hear so good.
I bought a Vizio 36 inch 2.1 sound bar from Best Buy after doing a bit of research. It connected via the optical cable and a power cable. The sub woofer was wireless to the sound bar and I plugged it into power behind the couch. Fixed my hearing issue and wasn't too intrusive or expensive.
I'm still receptive to the idea of getting a soundbar or some kind of center channel speaker, with the optical digital connect.