I'm think another 3db is volume isn't going to make any difference to me, but....
That's what Roger basically told me. My room is 18.5 x 14.75, and we listen to the same type of music. I'm even light loading mine and do not notice any side effects. There is plenty of oomph.
Roger did mention there might be some improvement in separation, but he didn't seem to think it would be revelatory.