Speakers that mate well with Plinius 9200

I also have an 8200 and drive Tyler Linbrook System 2s with it. For me that are a very good match, enjoyable musically and none fatiquing. A little out of the range you want to spend, but Ty offers quality 'used' speakers. I both the Linbrooks and Taylo 7Us for a second system that way and am very happy.

Would the 9200 drive Magnepan 1.6s?

Totem speakers and Plinius work very well together and would fall within your budget.
Regards Steve

Which Totems would work in a room this size?

forests!