I was a big Leatherman fan until I was fortunate enough to find the Victorinox Swisstool. In my opinion it is the best big multitool on the market.
The selection of implements is great, particluarly on the model that trades the toothy blade for some nice scissors. Victorinox has a nice tendancy to make thier implements multi-functional, so what may just have been a screw driver on a LM will serve another purpose as well.
Really, nobody has more experience making folding tool implements that really work than Victorinox (except perhaps Wenger). Everything, from the can opener to the awl, is genuinely useful.
There are some who seem to have had a problem with the Swisstool's implements being too soft, but it appears that that was fixed some time ago. I know mine have held up great and get a good bite on screws and nuts.
The SOG products look nice, but I don't think that the "compound leverage" is much of a benefit. In almost a year of use there has never been a time where I needed clamping force in excess of what the Swisstool could comfortably provide. The number of compromises which are required to get this compound leverage are, IMO, not worth it.
I do really like the way the Sog products can be disassembled, however.
EDIT: The biggest flaw in the Wave is the lack of locking implements. The first time that one of those screw drivers folds up on you at an inconvenient time you'll wish you got something else. Due to the offset design it is possible to avoid this if you're careful, but it forces you into a awkward motion since the head is not in line with the body of the tool.