Thanks, good advice. I need to check/consider a few things first...
1) There is a lot of duct-work behind the drywall. May not be possible, or may be possible, but not centered between the existing L-R speakers.
2) Considering I have a 56"DLP on top of a TV stand, That would require a very high installation. Prob would be much higher than existing L-R.
3) Considering the price/work/sound quality, perhaps a decent Polk or Infinity would be a better idea?
Thx again!