Thanks to all. My listening area is about 2000 cu ft with a ceiling that goes from 8' and slope upward to about 14'. The speakers will be aligned across the wall with the ceiling that slopes. Not ideal but the only placement that is logical. I listen at moderate levels about 80 to 85 db, sit about 10' from the speakers. I do have an older sub from "Speakerlab" that goes down to about 25Hz and is driven by a separate external amp. Just as an aside I found a pair of M80v2's for $800 (without shipping) online. they are in Beech but I prefer Boston Cherry. That has been one of the hold-ups for me in fully considering it as well as the need to acquire a receiver. I do however have an early 1990's Denon receiver @ 55watts per channel. Would that work for the M80's?