I'm using an MA5200 to drive a system in my office. The local Mcintosh dealer has suggested separates. Seems to me all I'd be doing is increasing the footprint of the system and bumping the amp power from 100 to 150 watts per side. At the level of modern Mcintosh gear, why go the separates route? The suggestion was to replace the MA5200 with a C47 preamp and MC152 amp.