You can set the amp to only use the 5 speakers and redirect the .1 to the fronts, ( you don't mention a sub) and the 6th can be left off. Let us know what your getting and a review here when its all up and running.
Thinking of getting Two ( KEF) Coda 90s as fronts, with a Coda 80 centre and two Coda 70s for rears. This will all be powered by (not sure but maybe - suggestions welcome) a Marantz SR5400 ( which is 6.1)
I wont be getting a sub as the Coda 90s are pretty meaty ( go as far down as 37hz sensitivity)