What you are looking for top 10?
Quality?
Precision?
Speed?
Productivity?
Easy maintenance?
Cost?
Cause for an example we are evaluating 37 brand of 3D printer at the moment here in the office and I can tell you that we will not get the same result depending of what you want to do.
(not sure if I will be able to share the details with you guys, honestly it cost us a lots of time and money for this "study", but i can probably share some hints)