Personally I would look at Carradice bags for general designs. They can't seem to keep up with demand. For refinements on their designs, look at Acorn bags, which are simply amazing in quality and attention to detail. They have taken Carradice bags up a notch or two, but again they can't seem to keep up with demand. Carradice style bags are perfect for commuting ,, IMHO, because they are not too large and bulky like many panniers, are easy to install and remove, and center the weight so it has little effect on handling.