Nikon aw1 or sony nex 5n? (with waterproof case)?

I was looking for a good mirror less camera. And i came across the Nikon aw1.
I liked it because it was waterproof and had interchangeable lenses. It was perfect for me because I'm not really careful with electronics, or anything:/ then i found the Sony nex 5 and a waterproof case for it. Now I'm having trouble deciding of which camera to buy.
What do you guys think?

Sony is better but may be more expensive.