How much wood will you need to process? I.e. what is your location, the climate in which you'll be doing this, etc?
Without knowing specifics, I like the 19" axe as a good all-rounder if weight is a concern. It's long enough to use for short periods two-handed, but not unwieldy as a one-handed axe (hatchet). The Wetterlings Large Hunter is 18.75" long and about 2.25 pounds. Dropping to the small Hunter, you drop 3 ounces or so, but lose 4" of length. The extra length makes chopping take less work. If you want to use the axe to process any game, the 19" length isn't too big to choke up on the head and use the axe that way.
If you're going to need a lot of wood and don't mind sacrificing some close-work capability, you also have the Swedish Forest Axe, which is 25" long (classic trapper's axe size). You gain 6 inches of length, but also add a pound to the package.
IMO, I'd stick to the Large Hunting Axe if I could.