Here is my favorite sharpening system to date.
Buy this $40HF sander
1'' x 30'' Belt Sander
Buy 1 each of 30 Inch Aluminum Oxide grinding belts (180, 320, 500, 1200 grit) - $4.20 each
Lee Valley Tools - Important Announcement
watch this video:
YouTube - Belt sander knife sharpening
don't think the 180 grit is needed unless the knife is a total mess.
NOTE: practice on 2 cheap knives first..once you get your technique down, you are good...
I haven't bought the leather belts yet, admit i don't think i need them as the 1200 grit (9 micron) puts a very very good edge on for general use...
i've tried a lot of systems (chef's choice, lansky, etc), but i swear this is the best edge i've ever gotten, period.