I owned the Maggie 1.6 for a while, and having worked with CIA, Wyred4Sound, Rowland, Peachtree Audio, etc. I would not use any of them as my preferred amplification for that speaker. I believe the high end of the 1.7 has not been reworked, so I would likely seek a stout class A/B design or hybrid like the Moscode 402AU, which I reviewed. High power class D with the Magnepan wore on my ears over time.
In my office I use the Eminent Technology LFT-6, a magnetic planar design, with two HSU STF-1 powered subs. The Peachtree Audio Nova is my amp, but this is a concession to convenience, not what I would use if the speakers were my primary rig. The Nova is commendable, but like other Class D designs I have used does not have the richness of a Class A/AB design which is imo necessary to get Maggies to sound their best.
The Monarchy Audio SM-70 Pro (reviewed; run mono) was outstanding overall with the Eminent Technology LFT-8B; the Monarchy SE-100 MkII may be superb with Magneplanar or E.T. Though it may not power the speaker with unlimited dynamics, it would likely be a more sensuous sound.