Classe CAM 400's vs ARC REF 210's.

Any opinion will be welcome. My Pre Amp is an ARC REF 3. My speakers are Revel Salon 2's. I am currently using the Classe Mono's and condidering a switch to the REF 210's.
Would I be going backward or forward if I made the switch?

Thanks in advance for any and all opinion(s), John