http://www.bbastrodesigns.com/
is probably the best.
i picked up a 2nd hand dob driver
http://homepages.accnorwalk.com/tddi...000/page3.html
and love it, but if i had my choice of two new ones, then Mel Bartels is the way to go, way more people fiddling with it
I have motorized my 10 gso dob and it is great fun!