I use a C-2420 that drives an A-46 and to me it is basically perfect.
(As for me it was basically perfect my C-280V when I tried it with the A-46).
However, my über-humble opinion is that a DG-58 (or a more advanced one, and there are many) EQ would bring you a way bigger and tangible improvement in your system sound.
But I am not an audiophile
