I would say feasible.
My measures with the M60s were at 10 to 12 feet (don't exactly recall now) and i pushed them with an AVR at the time (now i can use a dedicated amp if i choose).
So, M80s, larger speaker, plus closer distance to measure by half, and discrete amp, i can see the possibility of those SPLs being attained.

"Those who preach the myths of audio are ignorant of truth."