Well, I'll defer to Ejlif on the heat generated by the JC-1s, since I have never actually owned them. (I saw and heard them at a dealers, and they did not seem to run all that hot, (warmish yes), but then again, they were in a large air conditioned room, that probably did a better job of cooling than your typical living room would!)
My recommendation then would be to find a good pair of Class AB amps, that aren't heavily biased in Class A (as the JC-1s, or my Lamm M2.1s are). I am not a big fan of the Class D amplifiers myself, but I will admit that they do run very cool. (I heard the Nuforce ref. 9's, and they don't sound all that great, IMHO. However, perhaps the Bel Canto ones suggested by Ejlif are better.) I would definitely audition them prior to purchasing them though.
My recommendation then would be to find a good pair of Class AB amps, that aren't heavily biased in Class A (as the JC-1s, or my Lamm M2.1s are). I am not a big fan of the Class D amplifiers myself, but I will admit that they do run very cool. (I heard the Nuforce ref. 9's, and they don't sound all that great, IMHO. However, perhaps the Bel Canto ones suggested by Ejlif are better.) I would definitely audition them prior to purchasing them though.