perfectimage, ewe say:
"The further from the wall the speaker gets the less defined the image gets...."
this is precisely where i disagree, & think the exact opposite is true. in *my* experience, proximity to side walls, & to a lesser extent, back walls, is what ruins imaging in many speakers. the sound-absorbent wall treatments need to be at the 1st reflection points specifically to *remove* the wall.
in my listening room, the speakers are ~5' from the rear walls, ~8' apart, & ~9' from the side walls. i sit ~10' from the speakers, with ~23' behind me to the rear wall. with my 25'-wide room, there's no way *any* speaker is gonna image outside the side walls, and i wouldn't even want an image that wide - it'd be way-too-unnatural. the *depth* of the soundstage, however, often *does* sound like it extends beyond the wall behind the speakers, tho. but, this is not unrealistic.
regards, doug
ps - david, sorry i'm not more specific - my measurements here are approximations. i *do* think it's best to keep as far away as possible fro the side-walls, tho, &/or use sound absorbtion at the 1st reflection point if they're anywhere near the speakers. monitors too far from the rear walls can lose lo-end reinforcement w/o subs, so there can be a soundstage-vs-bass compromise regarding how close/far to the rear wall ya wanna have the speakers...