That still requires purchasing Tormek jigs which are
expensive...although the base sharpener is $150 or so less which cuts
the pain some.

The description in the catalogue of the Makita says it can handle up to
15" knives...is that as it comes or is that some sort of hype?

I just pointed out that you can make the makita do more then any other machine.
It should be able to handle them. the knife older is atleast 12" but I bet
longer. I have only used it for jointer knives. and then only a couple of times
since I did not have a jointer for a long time. but you can make the jigs too.
though most of my work is free hand.

--
Knight-Toolworks & Custom Planes
Custom made wooden planes at reasonable prices
See http://www.knight-toolworks.com For prices and ordering instructions.