I bought a Fuzz Face kit from GGG with the 60's options adding knobs for bias and contour to the standard fuzz and volume.
http://www.generalguitargadgets.com/index.php?option=com_content&task=view&id=101&Itemid=26
I have most knobs cranked up full and volume set to a slight boost. This is probably the most musical fuzz I've played, most others get some really extreme sounds that are fun but a little out there. I have the basic silicon transistors but will probably be experimenting with different ones soon. Enjoy!