I'm an ewallet person, myself, but here is one of the best comparisions I've read:
http://www.jenneth.info/archives/000049.html
Take time to let it load, she's got a large number of screen caps.
EWallet's newest version lets you set up your own, generic cards, which is an improvement over previous versions. It does what I need, so I haven't looked further.
Good luck in choosing! Having one is a very good idea.