I have a lightweight ballhead. It gets the job done and I only got it because I underestimated the capacity for my tripod ballhead (got a bigger one for the tripod, moved the original to the monopod).
I think the new RRS swivel clamp is where I'm headed, personally. The old Manfrotto standby is a good solution also.
Depending on what/how you shoot no head at all is best, but with a QR clamp at least.
ball head
