Best Full-Function Preamplifier

It sounds like you are talking about the Classe Delta PRE.  It sounds amazing and has the perfect complement of features including a great phono stage.  I love mine and I threw the HDMI card in there to get ARC from my TV.  No complaints.  I’ve also had the Hattor passive line stage with tube buffer, the flagship Parasound, and the list goes on.  It’s no MSB, for example but what is?

How many turntables/tonearms will be used? Is one phono input acceptable or are 2 phono inputs required? What kind of cartridge? Mm/Mi or Mc?

Is adjustable gain per input required?

How many outputs are required? What kind of outputs, single ended or balanced?

More information would be required to provide reasonably accurate recommendations.

This is a little ridiculous. If you want reference level you should not either have a built-in phono stage or limit yourself to $20K. $20k would be enough for reference level power cord, maybe. I hope, I saved you a lot of money. Or exactly the opposite. 

Townshend Allegri Reference Passive Preamp + ASR Basic Exclusive Battery powered Phono Preamp. 

Congratulations. You just made Nirvana. 

dodgealum Look up Radu Tarta  he is considered one of the very best Vacuum tube engineers in North America  40 years in the trade.he builds only no compromise  DHT Preamplifiers  most name brands as I stated many times being a ex audio dealer only 25% goes into the electronics ,the rest R&D overhead and markup  with these custom 

builds it’s like building a Bentley to whatever standard of parts quality  you want .  My friend has one of his deluxe 2 box DHT preamps  for sale like New ,retail this would be well over $15k only 2 years old Like New.