beetlemania,
I'm always looking for the most immersive sound I can get, while not sacrificing image density.
For whatever reason, the 3.7s can be spread ridiculously wide and still have focused images.
The 2.7s, which are the next version of your 2.4s, are very good in that regard but don't take to be spread quite as wide.
Still, I've got my 2.7s at 8.4 inches apart, 6 1/2 feet from my listening position, and the image density (their hallmark) is superb. I just demoed them to a musician friend and the first thing he raved about was the imaging and the "thereness" of the images between the speakers.
My room was designed with an acoustician - it does both home theater and 2 channel listening duty. It's 13ft x 15ft deep, 9ft ceiling, with a large opening to one side of the room into the hallway. That opening helps "save my bacon" too I think. It's a well damped room.
My Left speaker is close to the side wall, near a fireplace with reflective tiles, so for years I have placed a thick velvet cover over those tiles when I'm listening. It mellows out the sound, reduces hash, increases image focus. But just recently I've tried leaving the cover off and I've really appreciated the added liveliness it brings to the sound. The only issue is that tonality does take a little hit.
So I'm going to order a curved diffusor and try that out, to see if I can keep some of the liveliness I'm enjoying, but restore a bit better tonality.