Current system is:
- Onkyo TX-NR646 receiver
- Energy 5.1 Take Classic Home Theater System.
- Replace the same center channel speaker (used on Ebay for ~$50)
- Replace the center channel speaker with something else.
- Get a new 5.1 system to replace the Energy 5.1 speakers (all six), price range, say, $300.
- Replace everything with a soundbar system, the one that I have my eye on is the Polk Audio MagniFi Max SR Home Theater Sound Bar ($449)