leighman,

I own both, I perfer the wave just a little more but looking at your prioritie let me say a couple things. the swiss tool spirit has a partially serrated blade so I would pass on it looking at your list.
if the highest priority is the saw I would by a swiss tool, not the spirit model but one of the other models. I think from lots of use and side by side comparisons that the sak saw is the best, next leatherman, Bear and son, and sog is at the end. all blades lock on the swiss tool and it has 1 straight edge blade and one fully serrated blade. their blades have great edge retention. I read cliff stamp says they use sandvik steel. I don't know about that but it is great. the file is good and if you use it to saw metal like i have it is slow but works. that is beacause it is a metal saw. the leatherman has a file but not a metal saw. I use to carry this tool everyday but switched to my leatherman because it has a pocket clip and lots of little bits. I hope this helps.
terry