Power amp recommendation
I looking for a recommendation for a power amp, new or used in the $2000 range.
Magnepan 1.7i.
Your Maggie 1.7's are a easy load for a 4ohm rated amp up to 5khz then up from there they get more difficult to drive as you can see with the falling impedance and the increase in -phase angle.
https://www.stereo.net.au/forums/uploads/monthly_06_2016/post-118179-0-66659900-1466167994.gif
For $2k used
150w-200w Parasound and Aragon mentioned are good choices, as would be some earlier Pass Labs and Threshold amps.
Cheers George