ARC Ref 210...tube virgin

I owned an ARC CL-60 tube amp which I traded for a new VT-100. It, apparently, had a bad 6550 power tube (discovered by dealer the next day). I had no idea something was wrong. The point is losing a tube doesn’t always mean a catastrophe.
Good luck with those fine tube amps!
P.S. What is the rest of the system?

adg101 is right. It's usually the norm to use a great tube preamp with any number of SS amps (sticking with mono amps is a good plan). I've had my eye on a Pass 250.8 (stereo) and Pass 100.8 (monos).