if you do go for one, I would definitely recommend the electronic doser... adjustable to .05 of a second, and virtually eliminates wastage. it also cuts out dosage variation, for the consistency. bloody marvellous I reckon.
Compak is coming out with a new electronic doserless version of the WBC model(conical burrs), it will be nicely priced and performs between the Kony and Robur. I think people will really like them for the price and how they perform. I also agree with other comments on the Jolly it is good as long as you dont get real busy.