In the process of putting together a HT system:

Denon AVR-2802
Axiom M50 (front)
Axiom VP150 (centre)
Axiom 175 Sub

Trying to decide whether to go with M22i or M40 as the surrounds. What'll I gain/lose by going with either one?

The family room is about 28'X13'X9'. The sofa is placed along one of the long wall. The fireplace is located in the middle of the other long wall so the viewing area is about 14'X13'X9'.

By the way, does anyone know what is the post size or M50, 40 and 22i? Are they the same?