Depends on what you are after. Mid size for easy of carry, or big honker for harder use? Any particular tools that are more important than others? For example, the Swisstool's scissors are killer (for fine work), and the SOG's are not. But the SOG gives you compound leverage on the pliers for extra gripping power.
As a general rule, anything from Leatherman, Victorinox or SOG will probably do you good. But the narrowing down is the fun part, because it depends on what you are after, and its also very subjective.
Without knowing more, I would lean toward:
medium size/duty: Wave, Swisstool Spirt
big size/heavy duty: Swisstool (not the Spirit), Supertool 300
The Victorinox lineup is put together like a swiss bank vault. Tight tolerances, smooth finish, most tools in the least space. But Leatherman has an aesthetic appeal and utility that is hard to beat.