Eidolon, Amati Homage, or Watt?

Great equipment, and great listening space. I once owned the Dunlavy's, and it is a fine speaker. I can certainly handle power and fill a room, but I've since found other speakers to be more refined and less grainy. The Avalon is about as refined as you will get, but I have found my Radian HC, which I just got, to be current thirsty, and my ARC VT200 may not have enough juice to bring out the best of the Avalon. I'm not sure if the same would be true of the Eidelon. Even though the CJ is 275w, it's strong suit is musicality and not power. You may also want to consider the Audio Physic Avantii III or Caldera, Vienna Acoustics Mahler, and the Revels.

Since the Dunlavys, Amatis, Watts, and Eidolons have different presentations, ranging from laid back musical (Amati, then Eidolon) to potentially detailed and agressive (Watts, depending on system), I would choose the speaker characteristics I wanted first. I believe the Eidolon has better bass than the old SC4's, but the bass is less well integrated (and powerful) than the best. It's imaging is superb, as is the refinement, speed, and tonal characteristic. The Watts are, IMO, the most dynamic of the four.
Eidolons are reasonably good with lower powered amps but improve markedly with higher power - you will likely find yourself looking for trade-ins eventually on the CJ's to higher powered tube amps or solid state monos. Check the Eidolon reviews on AudioReview.com and in old A'gon threads, there were some earlier good comments on amp and power matching from a wide range of users & tastes.

I have only heard the W/P and the Eidolon. The Eidolon is not only a little better, it is in different class. The W/P sounds techni color, the Eidolon sounds real.
I think the C-J Premier 8 XS will okay I think, since other people have reported good results with BAT VK-60 mono (120 watt) and CAT JL-1 (100Watt).

I agree that the Avalon is on a higher level than the others mentioned, but I also agree they'll probably need more to make them sing than the C-J can give them. I will say that I have never been a fan of Wilson Audio speakers, but the Watt-Puppy 6 is a different animal, it actually gives that "big" sound that the Dunlavys can give you when set up right, a marked difference from earlier versions of that speaker, has surprisingly good bass which is substantially better than prior marks of the speaker and I think it would work well with the Connie-Js (I've heard it with VTL 150s, ARC Ref 300s and Nagra amps, all to VERY good effect). You should be seeing good deals on them now, too, because Wilson is reportedly redesigning them as a much more expensive speaker and using the Sofia to take the W-P place in the sonic-price niche. They are worth an audition if you want to keep the same (excellent) electronics you have now (and believe me, I thought I'd never say that about this speaker).