Recommendations for tube amp to replace Plinius

You may be happy with Rogue amps, not the most revealing, but very nice sound.

Music reference RM-10. This is under your budget as a new amp and just got a rave review in Sensible Sound. I use the RM-200 and love it.

Being there with Plinius 100 mk3. Went with Mesa Baron, and Dynaudio Countour 3.3, and went back to Plinius! Plinius is fantastic amp, especialy in class A operation. What would you like to achieve with changing of the amps? I gained little bit deeper soundstage, and more liquid midrange, bass was good too, but not as good as with Plinius. I would look into better tube pre-amp, before i ditch Plinius. If you want tube sound, try Pass Aleph amps!

I'd try the Sonic Frontiers Power 2 I just happen to have listed. Shameless plu, and I'm willing to give you a more in budget price.

I have a pair of Focus 20/20 and use the EAR 534. It is 50 wpc and has rca/balanced inputs and also individual gain controls for each channel. It is a beautiful amp with a chrome front. It is also relatively maintenance free as tube amps go. It can also be mono. I have two of these amps and really only need one to drive these speakers. It retails for $3595 and I would sell you one of them for 1850 shipped.