As much as i would agree with attempting to use M22s laid flat instead, you also have to consider the cables and necessity for an AVR to run all this...
A soundbar in this instance might make sense.
Still, where are you going to put all the set top boxes or cables for the tv itself which would require at least ethernet, satellite/cable, power bars....?

Maybe choose a slightly smaller fireplace??
Think of it as 'cute' rather than tiny Sonic!
smile

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