Icorem,
I would suggest you go with the latest Pass Labs 350.8 variety. Your speaker efficiency is a 87 db which requires an amp with a lot of current delivery capability. The 350.8 is within your budget ($13.5k), and you should be in position to trade-in your current XA60.5 s with a Pass Lab dealer or sell it through the Audiogon.
I had a similar issue with my Apogee Duetta Signature speakers (86 db efficiency) being driven by a Classe Audio DR9 amp (125 w/ch.). These are now being driven by Krell FPB 350 MCX monoblocks (350 w/ch.). You cannot believe the difference these made, better everything.....Your speakers require more curent than the XA60.5 can deliver.
I would suggest you go with the latest Pass Labs 350.8 variety. Your speaker efficiency is a 87 db which requires an amp with a lot of current delivery capability. The 350.8 is within your budget ($13.5k), and you should be in position to trade-in your current XA60.5 s with a Pass Lab dealer or sell it through the Audiogon.
I had a similar issue with my Apogee Duetta Signature speakers (86 db efficiency) being driven by a Classe Audio DR9 amp (125 w/ch.). These are now being driven by Krell FPB 350 MCX monoblocks (350 w/ch.). You cannot believe the difference these made, better everything.....Your speakers require more curent than the XA60.5 can deliver.