Favorite Plano/Storage for Tackle? (Iron specifically)

[surfisher]

Well, like the title says: What's your favorite storage system?

I currently have about 5 total plano boxes that hold mainly all my swimbaits from bass fishing. The problem I'm currently having is the plano box for my iron keeps getting dried out and cracking or it gets sand inside and basically trashes the iron.

Anyone have experience with the waterproof plano's? Or how do you store your iron for safe keeping.