The JC1s seem the default option. The advantages of monoblocks are (1) forced separation of the two channels - not a biggie - and in any event you do get 'dual mono' power amps; (2) The separate chassis are very useful for heatsinking. It can mean a particular design can be biased higher. (3) Speaker wiring can be shorter. This is beneficial, and said to more important than the corresponding interconnect cables. I'm not too sure about this latter point but very long unshielded interconnects can be an issue.
I was in a similar situation to you recently. I ended up getting a Pass X150.8. Fab sound quality but it runs hot, and takes a long time to warm up (I know that sounds like a contradiction. Others on my short-list were David Belles http://www.powermodules.com/about.html and Pureaudio who have a US presence. http://www.pureaudio.co.nz/ Plinius is great but Pureaudio can only be better. I guess that is how I would have gone but the Pass came up at an auction so I had to make a quick decision.
I was in a similar situation to you recently. I ended up getting a Pass X150.8. Fab sound quality but it runs hot, and takes a long time to warm up (I know that sounds like a contradiction. Others on my short-list were David Belles http://www.powermodules.com/about.html and Pureaudio who have a US presence. http://www.pureaudio.co.nz/ Plinius is great but Pureaudio can only be better. I guess that is how I would have gone but the Pass came up at an auction so I had to make a quick decision.