Pass Labs 150.8 and XP-20 versus PrimaLuna Dialogue Premier HP integrated

What speakers?

Sonus Faber Oly III. 

 The Olympica III are very nice speakers. I own SF Elipsa SE Reds. You might want try Audio Research separates. I use a Ref 5se preamp and Ref 110 amp to drive my Elipsa speakers. I know it is all tube, but it is truly a match made in heaven.

I listened to the primaluna vs a Musical Fidelity M6PRX at a local dealer at the time and went with the SS M6PRX. I wasn't super impressed with the Primaluna at least with the speakers I was auditioning.

i have since learned to love tubes and have the Linear Tube Audio ZOTL40. The lack of transformers makes this sound unlike any other tube amp and probably more similar to the Pass Labs amps than the Primaluna. The Primaluna doesn't come close sonically.

Not sure how you can mention anything PrimaLuna in the same sentence as PassLabs but in any case My vote would be for the Pass gear by a country mile.