Krell Kct vs Audio Research Ref 2 or 3

I was wondering if anyone has had the chance to compare these. I currently have a Kct but am considering the Ar Reference series. Yes I do understand one is tubes and the other being solid state. Opinions please.
Ag insider logo xs@2xrvito
Had them both!  The biggest question is what will you hook them up to?  
Go ARC then...should give you the most fleshed out, dynamic sound.
You should listen to Ayre as well