I have the Plinius 8200 and a good friend has the 8100(less power). My friend is driving Thiel 2-2's, the previous version of your speaker. Both of us agree that the Plinius sounds fantastic! My other buddy, the original owner of the Thiels, said they need a lot of power to make them really sing. If that is true, that would make the 8200 the obvious choice among the two (175 vs 100 watts).
Enjoy,
TIC
Enjoy,
TIC