i have a wave and its great, but alittle heavy. the charge is very similar to the wave, and i feel alittle better for the added price. 1 difference for me is the grip, my wave is too smooth when using the pliers, especially when my hands are greasey. the charge has a few different models, so you might want to check them out.
i also have a leatherman juice s4, that i carry for work. its lightweight, 3.5 inches closed. i like the juice size so much, i want to buy the juice xe6 to replace my wave. i especially like the file, and corkscrew for my wine
ive owned a sog also, and gave it to a friend, it has superior pliers, and scissors, but dont like that the knife opened from the inside of the handle, as opposed to the leatherman which the knife/file/saw can be accessed in the folded/closed position. and if you use the file alot, the leatherman file is much better.