Awsmone0,
I like the fact that you trust your ears and accept the reality of what you hear, denial can be crippling. You've tried many highly regarded SS amplifiers and yet they aren't satisfying you ultimately. You've listened to tube amplifiers and you seem to prefer them overall, although you note some shortcomings with them( nothing is perfect). It appears that long term with all things considered a quality tube amplifier will make you happier and more involved with your music ( increased naturalness and emotional realism).SS amps will win the specification/ measurement battle yet often tubes win the ears with sound quality and more musical enjoyment. .
I believe that Bvdiman is offering you very wise and experienced advice, he obviously knows your speaker quite well. I don't believe the issue is your preamp either. Continue to rely on your ears and spontaneous reactions to what you hear.
Best of Luck,