Dynaudio Contours with Conrad Johnson 2500a

I own the 3.0's and I don't know much about the CJ you mention. That said, the 3.0's will benefit from all the muscle you care to put behind them - I have used successive versions of Krell amplification and they have substantially benefitted each time. The 3.3's, while having higher sensitivity, still require a lot of current to drive them correctly. I would want an amp that doubles power output as impedence halves to mate with either of these speakers.

Apparently, the 1.8's are substantially easier to drive. Dynaudio claims they're the ones to own if you want to use tubes. It sounds like the CJ you mention is solid-state (?), but you might find that the CJ-1.8 combo works well. Assuming you already own the 3.3's, I realize this is relatively useless commentary :-)

Pettyfeversk - I initially was driving off two channels of the five channel KAV-500 at 100w/ch into 8 ohms. I upgraded to drive it from the two-channel KAV-250 rated at 250w/ch into 8ohms. I am now using the FPB-200c rated at 200w/ch into 8ohms. All three are rated to double in power all the way down to one ohm.

Both upgrades were very significant. The sound was nice with all, but there's no going back having heard it with the better amps. It's a much fuller sound, and gets up and "moves" without having to be as loud to get the feeling. The Krell and the Dyns are a nice match, IMO.

If the CJ goes from 250 w/ch into 8 ohms to 450 w/ch into 4 ohms, it might well work. Certainly sounds like it's worth a try if you want to go with the CJ.