Maggie Fans Chime in: Need recommendation for amp to drive Maggies (MMGs and 1.7i)

Pre-owned Vincent SP-331. Hybrid tubes/SS, 150W/8o/300W/4ohms. Well built, sounds great.

At a hair over a Grand - you should be able to get your hands on a Brand-New Emotiva XPA-2 Gen-3 (2-Channel, Modular Amp)
One of our local HiFi shops recommends them highly for driving Maggies

$1049 plus shipping Direct

For a bit less, you might be able to find a USED XPA-2 Gen-2

People have also had GREAT things to say about Emotiva PA-1 Monoblock Class-D Amps (these are based on a high-current version of the B&O ICE Modules)  You can pick-up a Pair (One for each channel / each speaker) for about $650 total.

     Class D amps in general have worked very well on my Magnepan 2.7QR speakers. I've used two stereo class D amps (Class D Audio SDS-440-CS and an Emerald Physics EP100.2SE) and I'm currently using a pair of D-Sonic M3-600-M mono-block class D amps.
     In general, good class D amps have extremely low distortion levels, dead quiet noise floors, have very good bass response, good dynamics, are very detailed and have a very neutral overall sound presentation, adding or subtracting nothing from the inputted signals like the audio amp ideal of performing like "a straight wire with gain".  The midrange and treble on good class D amps is detailed, creates a solid and stable soundstage illusion good but is still smooth and avoids being bright or harsh.
     Before trying class D I had used good quality class AB amps (Aragon, Adcom and McCormack) for decades.  Based on my experience, There are many good class D and class AB amps that would drive your Magnepans very well but I would suggest using a good class D amp unless you're willing to buy an expensive  top quality AB amp like a Pass.  
     Class D advantages you'll clearly notice are a lower noise floor, better bass response,better dynamics and a more neutral and revealing overall presentation.  I would characterize their midrange, treble and soundstage performance as very similar with good class D having the edge on detail level over the good class AB amps I've used in my systems. 
     There are also numerous non-sound quality advantages to class D amps over AB amps: smaller, lighter, cooler running, more electrically efficient and relative affordability.
       The best bargain/best value class D stereo amp I'm currently aware of is my initial D amp, the Class D Audio SDS-440-CS at about $650. It's an all around very good  performer for the price. American made, not exactly ugly but definitely not audio jewelry.  Here's a link:

https://classdaudio.com/sds-440c-class-d-audio-amplifier.html

     If you buy one, you get a 30-day in home trial period, you can get a full no questions asked refund if you don't like it, no risk.  My experience was it sounded great right out of the box but gradually performed even better over the next 6 months or so.

Best wishes,
      Tim

my experience is PS S300 and Odyssey Khartago Plus or Extreme.  Bryston makes great stuff, but he 4B is almost 30 years old ...

Van Alstine or even ATI amps can be had used at decent prices. I would even say that if you liked how your Anthem sounded, they too can be had fairly cheaply, MCA series or others. Is your current Anthem too old to bother with repairs? 

Have fun, a lot of good suggestions from others above.