Hi, I'd go with the DMC20 (the phono section is truly amazing if you're into TT). There really is the potential for audio magic if you do go the full Spectral/MIT combination. This approach is VERY expensive though. Goodluck.
Pass Aleph P vs. Spectral DMC-20
I currently own a Spectral DMA-200 amp. Am currently having some custom speakers made with all Focal Audiom drivers, custom x/o. Will also be running the big Snell sub with an Ashly pro amp on the bottom. I know the DMC-20 is somewhat of a dedicated piece for Spectral amp, but have read many good things about the Pass Aleph P (but haven't heard one yet). Haven't gotten to the interconnect/speaker cable issue yet; that's for last. Which is better for my system?