FWIW, my opinion is that seeking a tube amp to drive your low sensitivity, low
impedance speakers will be frustrating and ultimately unsatisfactory.
Stay with Class A solid state, or perhaps one of the new digital amp products,
i.e. Spectron, Jeff Rowland or H20. Frankly with your history as a Clayton
Audio dealer, and considering the stellar reviews of Clayton amps, I find it
intriguing that you are not satisfied with Clayton amps on your speakers.
Otherwise, I agree with the suggestion of changing your speakers to a tube
friendly design if you desire tube amplification.
It's the old "square peg/round hole" paradigm.