I use three different heads with my RB's, in the studio, I use a Cambo geared head on a UST studio stand, in the field, either a majestic geared head on a D&S Prolift tripod (heavy, but available cheaply on ebay) or a Graf Studioball on an old Gitzo 5 series without a column, nice for low level shots. The Graf has the advantage of accepting Arca style plates, and I use it frequently with the Sinar 4x5 as well. I have a Bogen 3051/3047 combo that works well, but it's a bit heavy and awkward for me in the field