From your list of wants:
Don't bi-amp if you go for the 1.6's.
I own 3.6's and have owned 1.6's in the past (liked them a lot). Haven't heard the new 1.7. Dramatic difference to some is a little different to others. You have to decide.
For amps (again, opinion but based that I do own the 30.5 and 100.5 fwiw): I like the Pass XA.5's. Get the biggest one you can afford but even the 30.5 will do fine unless you pound your eardrums.
Don't bi-amp if you go for the 1.6's.
I own 3.6's and have owned 1.6's in the past (liked them a lot). Haven't heard the new 1.7. Dramatic difference to some is a little different to others. You have to decide.
For amps (again, opinion but based that I do own the 30.5 and 100.5 fwiw): I like the Pass XA.5's. Get the biggest one you can afford but even the 30.5 will do fine unless you pound your eardrums.