Another for the Black Palm Syndicate hat. I'm a hat junkie and it's my favorite one I've ever owned. Really high quality material and construction.Another vote for the Black Palm Syndicate flexfit hat. I've got several in Multicam and they rock.
Another good one to consider is the First Spear Forager hat. It's 100% nylon so it doesn't hold water. It's got a bill that folds, which is nice for packing, and it has ingenious slots for putting the eye pieces of your sunglasses!