What size prints do you need? If you need tall prints all of the above would be awesome. I haven't really looked in detail at all the specs of the above printers but I can assure you that they all will need some TLC from you to make them sing. You will be able to get amazing and crappy prints on all of them. It is all about calibration and getting to know your printer.
That said...to be self promoting...if you need super large print volumes a RepRap Simpson can be scaled very large (My undersided prototype has a 10L print volume.) with standard electronics. Its print volume is much wider than it is tall. Of course, I am probably months off from even offering a beta kit. However, all the arms are very simple and can be made quickly by anyone with a jigsaw and a drill. A table saw and a drill press would be better. Simpson will also need a lot of TLC to make it sing for now.
Side note: The autobed leveling that Johann has put into the kickstarter Kossel is awesome and highly advised. If you want a printer that is ready to rock with the least amount of tweaking on your part then that is it.
That said...to be self promoting...if you need super large print volumes a RepRap Simpson can be scaled very large (My undersided prototype has a 10L print volume.) with standard electronics. Its print volume is much wider than it is tall. Of course, I am probably months off from even offering a beta kit. However, all the arms are very simple and can be made quickly by anyone with a jigsaw and a drill. A table saw and a drill press would be better. Simpson will also need a lot of TLC to make it sing for now.
Side note: The autobed leveling that Johann has put into the kickstarter Kossel is awesome and highly advised. If you want a printer that is ready to rock with the least amount of tweaking on your part then that is it.