I didn't have any Emerson's and was curious. I use rescue knives a lot in the ER so I picked up the SARK. It is one heck of a tough knife. The only thing I would have changed about it was to add some type of rescue hook/clothes cutter, which is what the NSAR (navy search and rescue) knife version of it was modified to at the request of the Navy. The NSAR can apparently only be ordered by active duty Navy personnel. Sadly (for my wallet), I now have an NSAR on the way. I'll probably sell the SARK when the NSAR arrives since it will be redundant. Here's a vid I did on the SARK.
[video=youtube_share;XoHXgolkVhc]http://youtu.be/XoHXgolkVhc[/video]
[video=youtube_share;XoHXgolkVhc]http://youtu.be/XoHXgolkVhc[/video]