Upgrading my integrated amplifier for my Magnepan 1.7’s

I'm a "Maggie man" since 1977.  Maybe my 2 cents can help.  Maggies like CURRENT. That's much different than wattage. 

I have a bias toward Audio Research because back in the day Jim Winey (Magnepan) and Bill Z. Johnson (ARC) were neighbors and besties and they used each others equipment to test and refine their products. Basically "They play well together"  Perhaps a used set of Ref 250s (8K) and a 2.7 upgrade would thrill you. I would me! 

I have had wonderful results with Bryston monoblocks driving Maggies (again current) and they really "wake up" with the 700B SSTs I have used.

As always go to a dealer and audition them. You cannot make a good and satisfying final evaluation based on old guys like me chortling about what they love. Results may vary! 

I agree with @pinwa , you need to stick with class A or AB.  My 1.7s sound much better with a 1990's 150 wpc NAD class AB Amp than they did with newer 300 wpc amps.  Hegel has a very good dac and high damping factor.  I like the suggestions of  luxman, bryston, coda and Audio Research as well.  There is no shortage of good amps in your price range.

https://www.usaudiomart.com/details/650105803-parasound-halo-hint-6-black/

I listened to 1.7i in a showroom paired with a Mac (cannot recall model). To my ears, I was a little disappointed in some sound aspects, particularly the lower octaves. I’ve had a different dealer tell me that isn’t uncommon with Macs. Prefer my Plinius.

That said, I agree with others that - space/room allowing - upgrading to a true ribbon model will be far more impactful than an amp upgrade.

If you're staying with the 1.7 the Parasound Hint integrated is a great match I used the paring myself before moving up to 3.7 Maggie's. Mac autoformers do not play well with Maggie's I called the factory when upgrading amps and they were the ones who told me also I know magnepan in the past recommended against class D amps. Pass makes a terrific pairing with Magnepan speakers as they have plenty of current. 

Good luck happy listening.