Need to learn about Audio Research

Preamp: Schiit Freya+ (tube) or Schiit Kara ((SS)..comes with remote control

https://www.schiit.com/products/freya-f

Power amp: Schiit Tyr monoblocks (SS, 350 watts @ 4 ohms) or Schiit Wotan (SS, 400 watts @ 4 ohms)

https://www.schiit.com/products/tyr

https://www.schiit.com/products/wotan

Schiit is a greater match than Audio Research for Magnepans and affordable for dudes with delicate wallets.

I’ve always heard about Audio Research being a great match, but I’m not familiar with the brand at all.

I’ll need to shop the used market since the new gear is way out of my price range.

https://www.arcdb.ws/

You didn't mention your budget.

My advice with ARC is to get advice about specific components.  IMHO the sound has change a great deal over the years, and therefore what matches well with a specific speaker may be very much model/year dependent.

Traudio,

ARC is indeed one of the big names in hi-end gear. If you have a trusted tech who has experience in repairing ARC gear, I say go for it. However, if you don't, you will likely be waiting a long time for possible repairs (if needed), and you'll pay through the nose for ARC to do them. I would honestly go in a different direction...maybe Rogue, Raven, or Quicksilver. A great combo, btw, would be the Quicksilver line stage and the 100W Rogue amp. Plenty of muscle, reliable, and won't cost a fortune to repair if ever needed.