Add Symphonic Line amps to yr list if you can: very good synergy (apparently, Ken, the CAT manufacturer uses these too). Also sounded good (liquid, soft--mellifluous) w/ a Rowland, don't remember which model sorry. Accuphase 50's also sounded beautiful.
Finally, sounds excellent --to my ears-- with a Symphonic Line Kraft 250 (that's my set-up). Haven't tried Krell or Classe...
CAT also make their own pwr amp (tube)... maybe worth a try? Good luck!