Appropriate Power for 1.7i's


I am sure this is the type of question that gets asked a lot, so I beg your indulgence for one more:

I have recently upgraded my speakers to a pair of Magnepan 1.7i's.  I am enjoying these speakers even though I know they are not receiving an optimal signal.  My goal is to provide a better signal.
 
My primary source is TIDAL HiFi, and here is my current setup

Power:  Yamaha HTR-5450 (only front channels used).  Ostensibly 85 w/channel --- I am aware that the specs for home theater receivers tend to be -ah optimistic.

DAC:  ifi nano iDSD (burr-brown)

Digital signal provided by PC

My budget for upgrading the Yamaha is modest:  $700-$900

Here is my want list:

100+ w/channel Stereo into 4 ohms.  ( I have no need for more channels):  Preferably Class A/B  (as opposed to D)

I am not opposed to purchasing used, in spite of the additional effort involved.

I am considering the Denon Heos and  Sonos Connect as a preamp.  I am not opposed to an integrated amp, but I like the fact that these units allow me to control my selection via a phone app (my phone is an LGv20 w/ Android 7).  Since I tend to listen to albums rather than individual songs or even playlists, the lack of this convenience is not a deal killer for me.


128x128markainsworth
What about using any of the Emotiva amps the XPA 2 at 250/500 or are they to thin or harsh sounding 1.7 or 3.5r
I've had a lot of Maggies over the years, including the 1.7s. I keep thinking I should "upgrade" from my Anthem integrated, but then I realize that it sounds killing and never breaks a sweat.
I had Emo mono 1L with my Maggie 1.7 and the amp kept blowing and was sent back multiple times for repairs also you are correct they were on the grainy sounding side, not sure about the particular model you mention. I switched to a Parasound Halo Hint and the sound was wonderful. I would stick to a high current A A/B  amp, in the past magnepan recommended avoiding D amps.