I guess what I am more concerned with is how much space up front i need ? if I have M80's, a 92- 108" screen, dual Subs most likely they are 2' wide so that takes up 4ft.

Basically how much space between the side walls and the M80' s do i need? say 1.5ft away given the M80's are 10" ea. so, that will require 4.5'. if I allow 1 ft from M80 to screen that 6.5' screen 8ft that's 14.5'. now that would put the subs 6ft apart up front the room 14.5'.
So should I allow more space to the side walls ? is 6ft space between two EP500's not enough ?

What would be the ideal space from the left to the right allowing for good speaker positioning ?
If dual subs is better than one, I would assume they not be side by side? That has already been answered in another topis, by Jake though.
Which leads me to ask is one EP800 better than two EP500's ?

The room will be approxiamalty 2300sq ft give or take a couple hundred


Pioneer sc-1525
M80 HG Cherry