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 volume do you listen at?  If you listen at 75dB or higher, I would get 400 WPC into 4 ohms or more.
btw: I got outbid on the McCormack. Just as well, I didn’t really want to deal with having to have it re-configured.

Also I have decided that I am willing to bump my budget to about $1500, though that will mean waiting a couple of weeks. That is also not all bad. It gives me some time to do some research.

On another note, I spoke with John Rustan. He thinks that a Bryston 4B is the way to go. TMR has some ST's for sale at $1600 each. I found it interesting that John offered this advice, even though he does not currently have any to sell. Looking at his website: audioconnect.com, I find he does have something interesting: A pair of PS Audio 250 Deltas.
I think limniscate is way too conservative in his assessment of needing over 400 WPC if listening over 75 dB.  I think that anything less than 1000 watts SS per channel for Maggies  is way underpowered at any listening level.  And since more is better I'm sure there are some amps out there at the 2,000 to 5,000 watt level that would be adequate .  Of course, I've been listening to my 1.7's quite happily for years now with a 60 W/ch tube amp but  having tried a few 400-500 watt SS amps that didn't do it for me obviously the problem was not enough SS power.
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