Looking for a great Bike Pannier

The problem with these things is that you really need to see it first. The different mounting mechanisms and bag closing options, plus size really makes or breaks it. You can't tell the quality of the zipper from a website, and if the zipper breaks, it will be cheaper to buy new panniers than to have the zipper replace locally in most cases. Personally I prefer the type that has a zipper closure, and some sort of bumgee cord type of thing (or spring loaded) to hold it on to the rack.

Having said that, you probably can't go wrong with Jandd bike bags.

Panniers are something worth spending money on to get good ones.