I'd say Spartan. Up until I got a Tinker for my birthday a couple of years back I always carries a Spartan. Good length blade and has the tools I use often.
Climber has a small pair of scissors, but how often do you need scissors of you have a couple of good blades? It also has that hook thing on the bottom, but no idea what it's for.

The Sportsman is basically a Spartan with a nail file sort of thing instead of a small blade. I have a knife with one of those and not only do I still not know what the hell it's for, but it annoys me no end when I go to use the small blade for some delicate cutting and find that stupid thing instead.

Needless to say I don't carry that knife much.
If you're the kind of guy who uses your SAK as your first tool, I'd recommend a tinker which replaces the corkscrew with a decent sized cross head screwdriver. I was always one of those people that said the small screwdriver head on the can opener works perfectly well for cross head screws, but I was wrong. The screw driver on the tinker is far better. It fits a better range of sizes as well as allowing you to unwind screws which are sunk into holes. On top of that because it folds from the middle of the knife, it allows you to use the knife body as a T handle which means you can put a good amount of both downward and twisting force on the screws. The only down side to it is that you need a bit of room to be able to turn the knife when using the screw driver, but I've found that most times I use it this isn't an issue anyway.