Now, if you really want to try a good but inexpensive carbon santoku try the Murata Buho: http://www.chefknivestogo.com/mu16sa.html
This little knife is impressive and you can get it screaming sharp. It's lacquered on the blade and has a handle that is also lacquered so it should be ok for you in a commercial setting.
I really love being able to recommend about 20 options for any customer need.
Selection, selection, selection. I would rather confuse customers with choices than not be able to offer them something that fits their price range and use habits.