They all work.  The best one is the one you will use.  It has to be easy to setup so that when the tools are dull you can quickly sharpen and get back to work.  If you can dedicate a space to sharpening or at least make it quick to setup, you will be happy with it.  

--Nathan, TX. Hire the lazy man. He may not do as much work but that's because he will find a better way.