I have owned a few Pass amps and liked them. In the end, they were very smooth but not as "energetic" as I had hoped. Down the road I tried the Coda, not moving away from Pass at that time, and fell in love with it. I considered larger Coda amps but this 8 unit is well broken in and just works marvelously. Both the Pass and Coda amps are reliable, quiet, and not fussy. Don't know about the XA heat signature, but the Coda never gets hot. You can place your palm on the amp and never fear getting burned (or heating up your room).
Best of luck!!