Been using a Feisol CT3472, Arca Swiss Z1 ball head, and Manfrotto 393 Gimbal. Ballhead for everything, the gimbal for any lens with a tripod collar. The gimbal doesn't lock down, but that is not what I wanted it for, I use the ballhead when I need to lock.

I modified the 393 by adding an Arca Swiss clamp made by Chris Hejnar, a fellow photographer with machining expertise. He makes all sorts of custom plates, clamps, rails, etc.

The Feisol has gotten hard use over the past 7 years of ownership - and no issues. They now sell a "Rapid" version of this, where the legs do not rotate when you lock and unlock them. I would suggest this. But this is a long lens tripod. Their Tournament Class(CT3442, CT3342) is lighter and more compact, and suitable for up to 300mm, and costs a little less. They have a range of ballheads, and one they bundle with the smaller tripod that is reasonable enough - nothing fancy but it does get the job done. I suggest bypassing the domestic vendors and ordering directly from http://www.feisol.com/