I'm looking at the same things ... from Ortlieb on down.

Ones that might suit you:

• Fast Pack pannier -- Seattle Sports Co.
• Wet Rabbit waterproof pannier -- Jandd
• Dry Lites panniers -- Arkel
• Local Saddle Bags -- Blackburn
• Front Roller, High-Visibility panniers -- Ortlieb <-- what I'm comparing all of them to.

Have not yet decided, myself.