I personally don't get on at all well with the GB splitting axes (I do process many, many tonnes of firewood each year). If its big enough to need a specialst splitter, I find nothing much less than an 8lb Maul and some wedges will do it.
If its small enough to split with a splitting axe, it can generally be split with a Scandinavian and a bit of ingenuity (like taking splitting the edges off the round, not down the middle)
Also worth considering that to split big rounds, you are going to be sawing big rounds - so a pretty meaty saw needs to be carried as well - likely to have to be a biggish bucksaw.
For me, sawing rounds with a bucksaw gets real old, real fast. They are useful for rendering small fallen trees into portable lumps though.
I'm in the "use a light axe on a long helve" for camp myself. But then I just aint man enough to lug a splitting axe and bucksaw very far - and then use them!
For home use - different story. Just get a full sized maul.