I kind of got away from hard PSK cases after a horse used me for a lawn dart.. and I had a perfect Altoids shaped bruse for weeks.

I really love these products:
http://usstore.aquapac.net/explore-produ...ase-uss348.html

In a pocket, on a belt, with a neck lanyard. Never had a leak or puncture (though anything I put inside it has sharp edges padded. I know it keeps contents dry after submersion: a whitewater raft tried to drown me once, and a trout stream suddenly grew a hole just where I was walking. In both situation I was in and under the water for a while. And everything stayed dry. Around water I wear this around my neck but UNDER a t-shirt: one time it was on my belt and hung me up while trying to get back in a raft.

The only thing inside which could be broken (and might argue for a hard case) is a compass... which is in its own hard case.
I put everything in a lightweight plastic bag inside the Aquapac so I can use the Aquapac as a water carrier if needed.