I'm looking for some recommendations for shoes for this spring and summer. Brands/specific styles a plus.

For work, I typically wear ballet flats in the warm weather, because I have to walk to the train to get home and I'm not going to carry a second pair of shoes.

At home, I currently have a beat up pair of Toms and a pair of Kenneth Cole sandals that I've worn the heck out of. I can't wear thong sandals, because they irritate my short toes.

I'm thinking maybe Birkenstocks? Or a casual pair of Crocs (not the clog ones)? I really need something I can run around in that won't hurt my feet after a long day.