I have a Bohning, Martin, Arizona and the Bitz. The Bitz by far has the strongest magnet which makes for a tighter bond between the shaft and fletching. Do not discount the Arizona which does three fletchings at a time! I like the Bitz the because of the magnet but one thing it lacks is the ability to adjust the indexing (just like the Arizona and the Bohning) which is important if you use nocks that are glued in.
I have just started using fletching tape and it is pretty good stuff.