interested in trying the rear entry bindings...is it the consensus that if you wear mens boots, you should be on mens bindings?
For Flow bindings, yes. That is a generality as there are some men's boots that have narrower soles, but most men's boots are wider than a women's boot in the same (adjusted) size. That is to say that if you compare most men's size 9 boots with the sole of most womens size 10 (the equivalent size) the men's boot will be notably wider. Flow bindings for women are narrower than the same size for men. Using a men's boot (most) in a women's Flow binding will cause extra friction on the sides of the baseplate when kicking in. This makes entry more difficult and can wear on both the boot and binding.