Tikka T3 Lite Stainless. Monster rifle for the money.
Savage model 99 lever action.You may even be able to find one in a take down model.
You say carbine, is there a particular reason you want a short gun? The 308 is a very good round and can be an all a rounder but it will not live up to to its potential in a stubby gun.
While I like that combo, If I'm going to carry a rifle, I want a potent rifle cartridge to go with it. Hornady tube-mag ammo lets you get superior ballistic performance compared to standard tube-safe type ammo.Or, you could go 'lean and mean', with a lever action rifle chambered in either .357 magnum, or .44 magnum. Choices of 16-inch, 20-inch, or 24-inch barrels. I have a 16-inch .357, with the John Wayne big loop lever, and it is more than sufficient for me. FWIW, ballistically, a 16-inch barrel is the optimum for tweaking every second of velocity and every foot-pound from a .357 magnum cartridge, with no gas leak from cylinder to forcing cone gaps.
I would hazard a guess and say cartridge availability. Part of the appeal of the carbine/scout is general availability of ammo. 308 is one probably one of the more common rounds, especially in.30 caliber. Some of those rounds you suggest are nice, but really are not sitting on shelves in most gun stores. 308, 270, 30-06, 5.56...pretty much available at Wal-Mart.Why do you specifically want a .308 Winchester caliber? If you are buying new and have the option of ordering a gun ok.