I've got Techniks and Maritool ER collet chucks in my VF2 and they are both good. Prices on Techniks seems pretty inconsistent, and they generally always have a package pricing deal going but the distributors (western tool for me) can beat that. Buying a bunch of holders/collets/studs at once might get you better pricing. Maritool has a package deal too and prices seem to work to within a handful of bucks difference max between the two. I've been buying all Maritool lately, they are good folks to do business with and no distributor in the middle.