I have a CODA #16 amp with a Benchmark HPA4 preamp. You can get those 2 for under $15k combined in the used market. Unfortunately, the CODA #16 is hard to get used. This combo is great with Maggies. I owned the LRS+ and the Mini.
If you want a lot cheaper the Schitt Wotan at $2k amp is as good as the CODA #8 (at $7k). The HPA4 preamp is nice with this combo too. I currently use the Wotan with the Mini and this is a great combo. I owned the CODA #8 v1 in the past.
I have no intention of changing the #16 or Wotan but I want to add either an Allnic DAC or preamp because each of those were the most detailed gear I ever heard. However, these are tube gear so there is a great musical sound to it. I am hoping they come out with lower cost versions of what I heard, otherwise it will be many years before I get that great sound in my system.
The Allinc preamp or DAC with a Schitt Wotan amp would be very nice too. I heard this combo in my house on the Magnepan Mini. The #16 is a better amp than the Wotan, but the Wotan cost $2k.
I used to have the Sanders Magtech amp with the Magnepans. The Sanders was not as powerful as the Wotan and the #16. I would rank it the 3rd best amp for the Maggies that I owned.

