This reference system is used to evaluate, among other things, masters for our 3 CD labels - The Laser's Edge, Sensory, Free Electric Sound. The system is in a constant state of evolution. Our most recent change has been the addition of the Zyx Airy 3 cartridge which is breaking in quite nicely. The Accustic Arts digital front end has been a stunning revelation for us - it offers an extremely detailed but non-fatiguing sound. No edge at all but it presents precise imaging and the deepest soundstage I have heard from a digital source. Our next planned change is to replace the Classe monoblocks with a Boulder 1060 amplifer. Nothing at all wrong with the CA-M400s (they are great) but I expect great synergy with the Boulder preamp. Only a handful of people have been able to hear the Cerious Ceramic Reference speakers. These represent Bob Grost's latest state of the art design. Bob used to operate Unity Audio. The CCR takes the Unity Audio PARM 4 piece system to a completely different level. I would suggest that they can easily compete against any speaker at any price.