benrosser,
Al clearly made a very sound case for why the Pass XA could be a successful pairing with your
Salk speakers and I suspect this would be a terrific sounding match with no concerns about power and current.
It is quite apparent however that you are highly impressed with
thpe sound quality of the LTA amplifier. As was suggested above the ZOTL 40 REF may be the better LTA option for your specific speaker. A direct comparison of the XA25 vs ZOTL 40 in your system would be an ideal circumstance.
My belief is that both of these amps will sound quite good but with very distinct sonic signatures.
charles