gwng8, I own Snappers and previously had a different model from AtmaSphere. I agree that Ralph is one of the best for product support, but I found Manley to be very good as well when I had a problem -- friendly, competent service.
Regarding sonics, I had different speakers and it was years ago for the AtmaSpheres, so not relevant to compare. Other than the different presentation from an OTL design, another consideration is the Snappers have a fixed output around 5 ohms while AtmaSphere amps typically perform best into loads higher than 8 ohms. What is the rating for the Kensingtons?
Oh yes, EveAnna Manley often utilizes Tannoys for demos with her electronics and at one time (not sure about current) she matched the Snappers with Tannoys in her personal system. And she loves R&R!