I don't know whether it is light enough or affordable enough to meet your criteria, but my "new" Manfrotto 054 head works really well with my 35mm equipment, my Mamiya C330, my Mamiya 645 and my Mamiya RB67.

It might even work with my digital body.

Here is a link: http://www.bhphotovideo.com/c/produc...Ball_Head.html