I am also looking at the spydercos. Correct me if I'm wrong, but the griptillian will have a metal liner in the handle where the spyderco will not? I'm a big fan of liners and the more solid feel, but I guess in a salt environment, the less metal the better. Not sure about the handle on the 111.
Not sure on carrying but considering kydex neck sheath. I've never used or seen one, but watched some videos and they seem to be more secure than I expected...so I guess I'd also like recommendations on best place to get one of those too. Man, i never even knew i needed all this stuff! This forum is expensive! ;-)