Bob, I hope you can ignore those (a minority) who are acting like this is their sandbox and you pooed in it.
You talked about the TV voices sounding thin and irritating; and wonder "if the center channel will sound even thinner than the M80s".

1.What do you have hooked up as a center?
2.What kind of calibration have you done?
3.You might tell your receiver that you don't have a center speaker to see how a "phamtom center" will sound. That will give you a better idea how the M80s sound.

I know there are more knowledgeable who will chime in to help.

Bill

Whose avatar should I borrow next?