In reply to The Lemming:
> I like my tripod but I find that the three knobs a bit fiddly and at times a pain in the arse when I want to adjust the camera a fraction here or there.
I use a Manfrotto 352RC ball head. It won't take a super heavy set-up but seems sturdy and grippy as long as you are being sensible. I very very rarely use my tripod, but I am glad, when I do, that I have this head. The model may have been discontinued by Manfrotto but look at pictures of it and find the new equivalent. I have interpreted your OP to mean that you are after a ball head. Sorry if that is incorrect.