This thread cracks me up. I will chime in though, and say "YES", three identical towers "DO" sound more seamless than two towers and a dedicated center channel. For a brief period I had the opportunity to experiment with three RF-82's. Now, with that being said, my TV was relocated to the side, but watching the movie was not my intent. I played back scenes from Transformers 2, and DID notice a difference going from two RF-82s + RC-64 vs. three RF-82's. Although the RC-64 is an amazing speaker, having all three identical speakers with identical tweeter and speaker heights provided me with a more "fluid" sound stage.
Currently I am running 2 RF-63's and a RC-64. They are VERY close, but the RC-64 does provide a different listening experience. Is it a bad thing? Not necessarily, I am happy with 2-Channel on the 63's and movie watching with the 64.