The 100s are not easy to drive to tonally correct results. That said, I once drove them with a 30W DNM -- it was OK at reasonable listening levels. I do think bi-amping (mid+high/ bass) rather than tri-wiring is a good idea.
I assume there is no way you can try yr amps on the speakers before you buy?
I assume there is no way you can try yr amps on the speakers before you buy?