An amplifiers compatibility with a system has more to do with your speakers than your processor. I’m positive the dreadnaught will be as good as any other amp with your MX121. The big questions are what are your speakers, how big is your room, how far back do you sit from your speakers, and how loud do you listen.
Theta Dreadnaught with the McIntosh MX121?
Does anyone have the experience of listenin to the Theta Dreadnaught with the McIntosh MX121?