I like PreciseBits products in general. Their collets have been great in my experience and their knowledge (and willingness to share) is top notch.
For a fun collet related read you can skim: Precision collet upgrade worthwhile? - #12 by TDA
Or just do a search for @TDA (disclaimer, he works for PreciseBits 
) all great info, much of it related to collets and such.