I went threw a similar conundrum. Started with a Rogue Cronus Magnum and loved it, however, in the summer the 4 Kt120s heated up the room to much. Ended up switching to a Rotel RB-1090 amp with a Rogue Metis Magnum Preamp. Just enough tube sound and much more power on tap when needed. I don't think I would go back to a tube amp or Integrated except with high efficiency speakers
Frank