For the small angle off of the axis I am talking about, I do not believe that the imaging is compromised.

I had my DX3 ML TL speakers at a friend's house last summer (Bryston SS amp) and a group started listening to them positioned on axis, everybody seemed content with this arrangement for a while. I was standing back watching and listening to the feedback and discussion comparing my speakers to his Dynaudio TL's. Then the group decided to try rotating then out a little to assess the change. Two people started rotating the speakers and when they hit about 5 to 10 degrees off axis the listener shouted "Right there!". They continued taking turns in the listening position and rotating the speakers more or less but kept coming back to about the same orientation. Nothing scientific, it was a different room from mine but the results seemed to be consistent with the way I have them set-up. It was an interesting evening.

Martin