Ken, any idea how waterproof that EOS is? Looking at the manual, all it says is it's a waterproof case. Waterproof, not just water resistant, which leads me to believe it may be comparable to the black diamond storm's IPX 7 rating but i can find no information about it other than this. I am leaning more toward the Black Diamond Storm at this point because we'll be on the water, and the Storm, according to the specs of the rating, will withstand immersion in water.

Quote from this site:

"IPX7 – This is for full water splashdown. If you drop your device in water up to 3 feet ... your device is still going to work."

My thinking is being on the river, with about 15 or so 10 to 15 y.o. boys who will want to swamp, overturn and otherwise get out of the boats and into the water, having a light that can go into the water and still work when it comes out is going to be a high priority as I will most likely have the light on my person.