I've tested allot, and I decided on 2.
Both by Adonit
http://www.adonit.net/
If you want to draw(technical drawings) then use Jot Pro
If you want to write/note taking then use Jot Script
The main differences are, the Pro doesn't have batteries, but there are chances of making marks with your wrist while writing. The script has batteries, and communicate with the tablet, and that makes it possible for not making wrist marks, but it's a little slow (little lag when quickly drawing)
The script also disconnect if not uses, then you have to link it again,
I like the one without batteries, and due to the fine transparent tip, you can do more precision drawings, where the Script does recondition and remove the wrist touching etc., but the tip is thick and solid, so battle to draw fine lines.
I would skip all the rubber kind. Useless...