Building new system starting with power amp. What would you choose ?


This is not how it usually happens, but what if you simply must have a particular amp and then move with upgrades in both directions? Let's assume that the only source will be RTR deck, so no preamp will be needed.
The price range..how about $15k new or used ?
This is a hypothetical exercise, I am personally not prepared for that yet. However, it would be, theoretically, perfect minimalist audiophile set-up. 
I myself would probably choose either Lamm monoblocks or Gryphon stereo power amp, both used of course.
inna
It don't work that way. You have to decide what speakers you can live with. Then get an amp that feeds them what they want. And why oh why do you think that you don't want a preamp?
When tape deck with volume control is your source you don’t need a preamp. Electrically must be matched, though.
misguided concept from the start

why not build a system around cables you love?  🤔
Anyway, I do have speakers in my mind that I would consider first, if I could find them used - Kharma.