What a lofty selection. I've heard the Evo and few other Krell amplifiers as well as a number of Pass Labs. Hearing these all in different environments I wouldn't give much weight to my opinion of each. I would go so far as to say, at this level I'd be much more concerned with the preamplifier presentation assuming you'd be using the same brand. In the case of Krell's Evo it's a system approach. To some degree so are the other brands your considering.
Big class A watts, talk about a carbon footprint.
Big class A watts, talk about a carbon footprint.