I couldn't disagree more with regards to LDTs opinion on bi-directional splitters below.
"I am not a fan of the bi-directional splitters. For about 70% of what we split, it only takes running the ram half way out to bust. So now you have the wedge right in the middle of the table and the options are either retract it for the next split, or extend it the rest of the way out for the next split. This would make a bi-directional splitter just as slow as the old style. And also keep in mind that the bi-directional splitters dont have as much power in reverse."
I have only operated a Splitfire bi-directional. They are in my opinion the cadilac of the woodsplitter. It is quality made in North America. They are as powerful on the outstroke as on the back stroke. I split a lot of elm and it never splits half way. In fact you have to cut it right up to the end of the stroke. Even if a log does split half way IMHO it is more efficient to continue to a point where there is room to put the log on the cradle to then reverse it rather than pulling back on the lever to get the ram back for re-loading. Often a splitting log will jam on any splitter. With the bi-directional you can simply put a log on the other end and as you split it the bound piece will be pushed out. No wrestling with a half cut knarly piece of wood.
Now having expounded on the best woodsplitter made I must admit I bought an $1100 22 ton champion chinese splitter rather than the $3300 ade splitfire. The reason was simple economics. I only split a few cords a year and when I own the unit I don't need a speedy machine. I haven't found a piece of wood that my 22 ton can't split.