I looked at that one from Performance that you linked, and it seemed ok for a basic trunk, but I needed somethning that had a little more capacity and padding for my camera. I settled on it's big brother:
http://www.performancebike.com/bikes...8_20000_400103
(It's not normally that tall, the top expands when needed) It may be the same one that 10Wheels got with the Nashabar name on it.