I have had a an SFA for about 6 years and it's been used heavily in that time and never been a bit of bother, though I have to agree on something a bit thicker for extended splitting tasks.
I have also had a GB wildlife hatchet for about 4 years now and this is the tool I would recommend for anyone wanting a handy and versatile hatchet.
It's a good little all rounder, perfectly capable of handling anything you would need to cut for shelter building, bark harvesting or general light chopping tasks. It can also be comfortably used for quite delicate carving jobs or at least; a bit beyond the roughing out stage anyway.
In my experience; the mini hatchet is too small and light, as well as overpriced. Then again; plenty of people use them and seem to do ok.
My brother uses one of those horrible looking fiskars hatchets, with frightening skill for chopping and splitting kindling. ( If I can figure out how to upload video onto photobucket, I have an interesting little bit of film of him prepping some sticks
)
As I say; I'd go with a Wildlife Hatchet
all the best
R.B.