Dynaudio Contours with Conrad Johnson 2500a

Which model Contours?

I meant the Dynaudio Contour 3.3 Speakers.

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 :-)