I am 8 feet away on the diagonal from my M80s. The backs of the M80s are a foot away from the back wall. The image is centered 2 feet above the top of the M80s.

I think mine image higher than yours because I live in Calgary and you live in Bridgewater.

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated