Mark,
I’ve been a Maggie owner since the early 1980s. Currently, I also use 1.7s in my system. Two pair in a quad setup. I was using a pair of Adcom 5500s. (I don’t know how the one guy found them to be dull. Everybody raved about their open, airy and spacious sound.)
Anyway, I recently decided to switch amplification and ultimately decided on Bryston 4B STs. They provide the same open, airy & spacious upper midrange and highs as the 5500, but with an added depth and articulation to the lower mids and bass. An excellent combination with the 1.7s in my opinion.
My point to you is that $1,600 is way overpriced in my experience. I just paid an average of $1,050 for mine. For that price you should get an amp in excellent condition with some remaining warranty.
If you haven't already done so, set yourself up on HiFishark.com and save a search for whatever amps you have an eye on. Hifishark tracks listings from, about a half dozen or more web sites (Ebay, audiogon, US Audio, and others). You can also see sold listings and expired listings which will help you get a better feel for pricing.
Shop around. Enjoy.
Toolbox