Hi all. New here and loving this site. I am easing into commuting to work. I do all of my errands by bike now and only drive to work which is 47 miles round trip. I plan to start commuting up to three days a week. I'm looking for suggestions for waterproof panniers. I like the looks of the Nashbar Action pack pannier but am concerned that with only one pannier it would throw off my balance. I'd love to hear recommendations on panniers.