I use an Otter Box, knowing that I don't trust it 100% in submersion situations, but I have a super tough Nikon waterproof camera in it. The nice thing about the Otter for me is it's the perfect size for my camera - they offer more sizes than Pelican and are cheaper I think. Of course, compared to a Peli Otter is garbage. I recommend either as long as the camera is waterproof. If it isn't, do a box in a bag - it's worth the expense to not ruin your camera.
A good trick with any waterproof box that leaks at the seal is to replace the seal with aquarium silicone. A fresh layer of that and an old box is like new!