Keen!!!
I switched between my Keen Newports and a pair of Reebok sneakers.
I LOVE the toe protection, and sturdiness of the Keens. In fact, we bit the bullet, and get DS a pair every summer as well. He's allowed to wear them to day camp because of the toe guard, and one piece heel strap, and they're much easier than shoes and socks every day, since they swim 2x a day.