I would love ASSOS bibs, but as Bluetree said, they are sooooo expensive.

I use mens bibs, they seem to work for me, and I don't have any issues. They fit ok... shoulder straps not a problem.
Brand? Just whatever is cheap/on sale.

We have buy most of our clothing (bibs, shorts, jerseys, gloves) and bike necessities (like tyres, tubes, cleats etc) online on sale from Torpedo7 and ProBikeKit.