I use the Arkel Utility basket. It holds qutie a bit, is very easy to attach and remove from the bike and has a sencod smaller pocket on top for keys, wallet, cell phone etc. I get my clothes (in an Eagle Greek folder) lunch and coffee in with room spare. I only use one on the non-drive side of my bike. Here is a link:
http://www.arkel-od.com/panniers/uti...asp?fl=1&site=