jafant...
The Pass, like my Thiels, comprise the reference points for what is now easily the best system I've had. I simply can't believe I could do any better spending significantly more unless, of course, I could move up a notch or two with either. It's not fanaticism, it's that the law of diminishing returns would seriously apply.
The Pass does run warm, to the side of "hot" for some, but I'll say very warm. It sits centered atop my Salamander cabinet, so there's no concern about thermal buildup. I usually let the B. A. T. pre and the amp warm up for at least 15 minutes before listening, as doing so with the Primare/B. A. T. combo I had before definitely had positive effect. With the Pass it's just gravy.
I know that Pass is one of your amp considerations. For me it's the best match for Thiel. A colorless revealing speaker being driven by a colorless, uncompromising amp.
Hard to top.