If I were you, I'd change to tube friendly loud speakers. Von Schweikert speakers are all tube friendly. I'm currently using VAC 35 watter (half of yours) with Von Schweikert and getting planty of quality bass. Other option to consider is to buy CJ SS amp to bi-amp (vertical) or go to VTL MB250 or higher output amp. Generally, tube friendly speakers will stay within 6 to 9 ohm. A little known fact is that Von Schweikert always vioce his speakers with tube amp. Remember that there is a very good reason way you love your CJ P11A. I know the sound of it.
Levinson vs Threshold vs Plinius vs Bry
Replacing my beloved CJ Premier 11A to power my Proac Response 2.5s with faster, deeper, tighter bass control (ie rythmic drive)without moving too far towards a dry, analytical sound. Considering the following used amps: Levinson 27.5, Threshold Stasis 200, Plinius 100, Bryston 4BST. I would really like to hear opinions of anyone with experience with these amps and especially if familiar with the Proacs. Thanks very much. Chet McHenry