I own the older W10, but have played around with the newer ones, as well as the Olympus... It all depends on your use. For just P&S with some weather protection, the Pentax ones are great. If you need something a little sturdier for more time in the water and just generally a bit more beating around, the Oly seems to get more favorable approval. Both will do that job... Try to demo both, as the look and feel are definitely different...