The KTM one looks ok. well made, my only concern with that type is are you going to use it for big rounds on the ground? - tree trunk sized stuff, 18" dia or more, stuff you don't really want to pick up, if so great.
But for all the rest of the smaller stuff you are going to be on your knees working, unless you can lift it with the linkage and lock it up at a decent height, maybe have a look at how high your linkage lifts and work out if you would be comfortable working at that height for a few hours.
The alternative is a horizontaly mounted one where the ram goes left to right rather than up and down.
If you are splitting a lot you want to try and avoid repetitive lifting.