Open baffle puts a lot of energy out the back side of the speaker. This contributes to that spacious 3D sound. Eric just added a new Signature Series model with two drivers on the back for just this reason.
I don't know how you had your Electrons set up, but if you want 3D imaging with a nice deep stage they should be aimed almost directly at your ears and absolutely perfectly equidistant and symmetrical, with the exact same toe in L and R. Use a tape measure, point the L at your L shoulder, R at R and you will hear some pretty darn good imaging. Then if you put them on Townshend Podiums I think you will forget all about open baffle for once and all.
I don't know how you had your Electrons set up, but if you want 3D imaging with a nice deep stage they should be aimed almost directly at your ears and absolutely perfectly equidistant and symmetrical, with the exact same toe in L and R. Use a tape measure, point the L at your L shoulder, R at R and you will hear some pretty darn good imaging. Then if you put them on Townshend Podiums I think you will forget all about open baffle for once and all.