I have owned the 8100, and auditioned the 8200 in my home when it was time to upgrade. Both are very fine pieces. I use the Magnepan 1.6qr's hooked up with kimber 8tc wire.
However, I did not buy the 8200 at upgrade time. I wound up buying the McIntosh MA6500 Integrated. I liked the sound and features of it better than the Plinius. I played both side by side for days and listened quite carefully. When it was time to choose,the McIntosh had better overall sound and the features and functions were much nicer. Plus..I bought American which is important to me.