I have not heard those particular Mac models but the Bryston 7B series monoblocks would be good options. I wouldn't consider them an upgrade per se but more of a lateral move with a different sound signature, e.g., tighter bass, more balanced and not quite as warm. I personally prefer the Mac house sound. You should definitely try it in your system before making the switch.
Magnepan 3.7i Amplifiers Aesthetix or Modwright? Thoughts?
Have a McIntosh MC-602 amplifier running them now, looking to up the game. I currently have an Aesthetix Rhea Signature and Calypso Signature, so naturally looking at the Atlas Signature. The Modwright KW-150SE running as a monoblock via a bridged config though sounds compelling. Obviously, I would need to demo these. Question: Who's got experience with either of these running tough 4ohm loads? Maggies want serious current, and both of these probably would fit the bill. My guess the Modwrights may be a bit more airy, which is great, but looking for better control of the bass from 100 down. Any experience or thoughts shared would be most appreciated! Thanks!