I have Fiskars X27 36" Splitting Axe, and an X7 Hatchet. I got the X27 as a combination splitting tool and everyday axe, but it does neither really well. The angle on the leading edge is too much to use as a general purpose axe, and not enough to use when splitting. It does OK, but two purpose-designed axes, or a general purpose axe and a maul would be a better option. Now, a small splitting hatchet might make a nice tool, but the X27 on 8" rounds of softwood gets stuck too often.
The X7 hatchet is nice, easy to sharpen with the included Fishers sharpener (as long as you don't let it get too dull), and comfortable in the hand.
I also have a SOG F06TN FastHawk and F01TN Tactical Tomahawk, just because they were available deeply discounted enough to consider disposable. The FastHawk is too light, but the Tactical is pretty nice, and seems to hold an edge OK. The almost round oval grip on both doesn't encourage good handling. They look cool, but not a good choice for your only hatchet.
One of these days, I'll end up spending the cash for a selection of Hultafors, Wetterling, or (drool) Gransfors Bruk