I hope this isn't a thread duplication, but I haven't found anything devoted to this specific topic. I'm in the market to upgrade my panniers, and wonder if anyone has any advice for me.

I want something that will hold a shirt, pants, book, etc in the main compartment; my cellphone, wallet, etc. in an outside pocket for easy access; and a separate outside pocket for my citadel lock as I do errands to and from work. So I also want a pannier that will hold grocery items, fruit, beer, and whatever. I do a lot of errands by bike. Maybe I need to get a different one for that? Water proof isn't a big deal, water resistant is fine. It would be great to take my computer, but not essential, only need to occasionally.

I see a lot of options online, but you can't tell about this kind of thing unless you actually see it and try it. The stores here in DC have a very limited selection of commuting panniers, even though commuting to work is taking off here. So I'm kind of stuck.

Any ideas?