Yes, I think the panels are perhaps your problem. I use a CJ premier 11a to drive ReQuests and have no problems and I think that tubes add a more realistic quality to Martin Logan to my ears. I have two Hafler 500's so power is not a problem but I much prefer the tubes to solid state and my impressions have been confirmed numerous times by friends and acquaintances.
Hope you get it sorted out.
Hope you get it sorted out.