I have the need to get the front R/L speakers (340's) off the floor stands. My two year old LOVES them and therefore I have to mount them on the ceiling.

The guy to do the work and rewiring, wants to mount them on the wall.

This is behind the current Center by about a foot and a half, and behind the screen by te same amount.

This is a large room 30 by 20.

will mounting these on the wall make much of a difference?