Best Integrated, period.

TRL! A few have posted the TRL integrated, I own the TRL mono blocks and I can't image a better sounding integrated.

I think the Pass is basically their X-150 amp with a passive pre, I don't think there should be any complexity or compromise that might occur when building a pre into an amps chassis. Pass certainly knows how to build amps, adding as passive attentuator (perfectly matched to the amp portion) should make for a great integrated, assuming you like the sound of a Pass amp, I do. I've not heard the integrated, but I would be shocked if it was a mighty good one. Not bad looking either IMHO.

Is the INT 150 the Pass model we're talking about?

Is there another Pass integrated besides this one?

No. I think that is their first and only.

While it may not be the "best" in absolute terms, the set of two Pathos Classic One MkIII tube hybrid integrateds running in Mono mode are wonderful. I have not encountered another amplification scheme quite like it, nor one that sounds quite like it. Quite a lovely concept and execution.

At upgrade time I sold my MkII's to a man downsizing from Boulder separates. He was surprised at how little he gave up in terms of performance. I wasn't surprised.