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

 The Pass Labs .8 series are truly excellent amps. I have a friend who has the 60.8. I  would go with a used Audio Research Ref 5se for the preamp.  IMHO it is better than the XP 20.  And ARC Ref preamps work really well with Pass amps. A little tube magic without as much upkeep. 

 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.