Ian, I currently have the M60Ti for mains, the VP100 cc and use the M3Ti for surrounds on stands.
The VP100 sits on top of my 32" TV inside an entertainment center. The EC stand about 63" high and is about 8 or 9 feet from the viewing position.
Sometimes the VP100 sounds a little tinny or nasal. Could this be due to having the CC inside the EC? Would I likely benefit by going to the VP150?
I suppose the first course of action would be to take the CC out of the EC and try it on top. But that puts it up pretty high.