wald folders at 2and 2/3 lb. each you can compare that to the panniers you are looking at.
I like mine because I bring my bike inside the condo and the office every morning, and it is nice to have them folded flat for getting in and out doors. But here in fort fun we dont get much rain. If I had to deal with a lot of rain panniers may be more of a priority. As it is I have a waterproof trunk bag with lock, tools rolled up reusable grocery bag, and usually a jacket on the way home.
the typical set up, after grocery shopping on my way home.
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good luck, there is no one size fits all solution in commuter land.