Upgrade to Simaudio or keep my Classe?

My system consists of mostly Classe components including CP-60 Preamp, CA-400 Amp, DAC-1 DAC. Transport is a Theta Jade and Speakers are Arcarian Systems Alon V MK III. Interconnects are Audiotruth Diamond x3 and Speaker Cables are Dragon SE Tri-wire. I also have a Rel Stentor II Sub and all equipment is powered by a PS Audio P5oo.
I am thinking of upgrading to a Simaudio Moon P-5 Preamp, Moon W-6 or W-10 Monoblocks, and Moon Eclipse CD Player. Is this actually and upgrade or pretty much the same quality as what I already have. If it is an upgrade, what benefits should I be able to hear (more details, better soundstaging, etc). What cables and IC work best with this Sim setup. I'm thinking o Cardas Golden Reference.
I would appreciate any thoughts or ideas. I'm new to Audiogon. Thanks in advance.
Mike.