I've had a GB Forest Ax for 20 yrs now. Put the 4th handle on it last year and it should be good for a long time. It's my favored utility camp tool. Bought a stack of them for employee gifts last year and they are identical to my old one. It won't do anything great, but it does everything around camp well enough. I'd size up though if splitting was a serious consideration.
Fiskars are my favorite wood pile tools. For processing firewood wood, they are great. I have the full set of 4 lb splitting axe, 8 lb maul, and the hookaroon and have heated my home with those for a lot of years now. For chopping and limbing tasks though I think all of the Fiskars / Gerbers are a little thick through the cheeks and the plastic handles aren't as nice as wood. Still, a solid economy axe. For camp chores, I wouldn't complain and the plastic will survive any reasonable abuse, including splitting wood well below 0F.
The Estwings are the worst of the lot for actually cutting wood (I have a couple). Steel is ok, but the heads are ground extremely thin, so they can't split campfire wood well at all and they tend to get stuck in wood chopping larger trees. The balance and handle vibration is also worst than wood or fiskars plastic. If you are abusive to tools though, they are the one to have. I have one under the seat of my snowmachine most of the time. Great for trapping, busting ice, leaving out in the rain and other chores I wouldn't want to subject the GB too.
Like most things in life, it's more about how sharp you keep the edge than the tool itself.