I think you said you wanted to sharpen kitchen knives too? This is what I use for that:
http://www.theedgemasters.com/Knife-Sharpening-System.html

I'm sure it would do a fantastic job on lawn mower blades, but it'd be waaay overkill.


M60's
VP150
QS8's
HSU STF-2
Onkyo TX-SR805
Audiobytes for the PC