I carry both the saw and SAK. They both have their own uses. I bought a Coast brand saw from Academy. $10 and weighs next to nothing. Unless you are planning to hike the PCT, the weight of both should be considered negligible, IMHO.
Also, I don't know if I missed it, but I carry some form of food source for even a short day hike. Just in case. Maybe something that keeps well like jerky or summer sausage and hard cheese. Anything to supply a few calories.
Another thing I carry I picked up at CVS. I grabbed a handful of the DEET bands and put them on my pack straps when I go out. It keeps the bug spray off of me and I have found that our wonderful Texas skeeters can't handle them.
I have also recently added a couple of carabiners and bungees because you never know, as well as some duct tape. I carry a deck of cards as well to keep myself and mind distracted if I end up in a real bad situation.
I cannot get the pic to load right now, but if you look up my SN on flickr, you can see a pic of my pack. Looks good though.
PeACE
Dougo