If you could find a used Convergent JL2 I would add that to your list, I heard the Merlins with that amp and it was very magical, though I think the Merlins mate up well with most any moderate powered tube amp. Pay close attention to atma-sphere as well, not many people are famaliar with there gear but those who are really like it, many people prefer the sound of OTL amps in there systems, so pay close attention to Atma. Good luck and I hope you get to hear all of them in your system.
Tim
Tim