resolution audio opus 21 vs. audio research cd 3

I'm looking to upgrade my arcam components that I'm using with Dynaudio Special 25s. I've heard the ARC cd 3 and liked the greater detail, transparency and less forward presentation than my old alpha 8, but am interested in the opus 21 for its flexibility with pre-amp and digital input
functions. I've also auditioned Krell, Classe, Naim plus other players and while they had their strong points, I seem to prefer a more liquid, less dry/grey sound, as well as wanting a deeper, less forward presentation than my arcam.

Any comparisons regarding tonal balance, dynamics, imaging, etc. for these two would be appreciated, thanks.