Are Pass Labs amps probably the best ever you can buy ?

There are many good amps. I am No expert but I have liked Mark Levinson during demos as well as Devialet.

No other company I know of takes care of their customers like Pass Labs. You can call them at any time and discuss your entire system. They will cheerfully talk to you. When it comes to repairing something NOBODY compares to Pass! Their philosophy is not to charge for repairs more then
necessary. I had a Pass Labs X1 preamp for years. It finally needed work. It was of a vintage that they needed to replace several circuit boards in order to facilitate the repair. I braced myself for the bill. Including a new shipping carton they charged me $125.00!!!!! Insane but great for me and all who decide to be Pass owners. Good luck. Joe    

I have owned many of the Pass products There is no better SS amp
made anywhere. And the customer service is second to none. You will not be disappointed. 

It all comes down to system synergy and with the right front end and the right speakers, Pass Labs are extraordinary. I have heard Pass Labs sound only so-so, but it has pretty much always been due to poor speaker synergy.

For my Audio Physic Avanti III, the Pass Labs XA60.5 has really turned out to be the best.

Pass labs would mate best with 93+dB sensitive speakers, imo. Unless you get one of the 100w class a ones but I think those are well above $15k mark!