Used Pre-amp/processor recommendations

[meglos]

The Integra DTR80.2 I have been using as a preamp is dying. Looking to move to a true preamp/processor. If it came down to good quality new vs. better quality used I'd go with better quality used. What used preamps should I look at?

-I won't ever be able to do immersive audio in this room so don't need Atmos, X, or Auro 3D. A 7.1 or even 5.1 would be good enough but if immersive formats are included it isn't a problem.

-It would be nice if it can pass 4k HDR, including DolbyVision. Not 100% required but would simplify my set up slightly.

-Source is Oppo 203, Amp is Krell Showcase 7 channel (only using 5), speakers are a mix of Thiel models, sub is a Paradigm Ref Servo 15.

-Balanced outputs not required.

-Budget is $1,000 to 2,000 US Dollars.