Yes most quality outdoor clothing is very expensive. But you get what you pay for.
Ive eorn a light wt pair of MT50 for quite a few yrs. They are my early season rain bibs which are no longer available. I fo have a pair of MT 50 Winter bibsI wear ice fishing.
I like bibs being a rotund guy!
My latest bibs came from Duluth Trading company. They are in the early mossy oak treebark camo and i really like those.

I want full length leg zipper for easy on and easy off. I also want a 2 way zipper as with long walks you open the top down and can dump leg heat. Sit and zip up as you cool down.
I also look for ankle snap envlosure to make a good fit around the top of my boots.

JW