I have the Ortlieb you're looking at, and have found it sort of cumbersome to load. It's an awesome design, except for the fact that it's small at the opening. I've thought about the Arkel Bike Shopper - but haven't wanted to treat myself to another pannier just yet

I second the recommendation of talking to REI. They've been great with me when we've had products wear out prematurely.

CA