I'm using an Acratech GP. It's a very versatile head, and I like it a lot for almost all kinds of use. The RRS I know by reputation, but haven't used them.
All of them are very stable heads. I don't expect any head to dampen vibration, or, at least not more than any chunk of metal of equivalent weight dampens vibration. It's the legs that affect dampening the most, because they are what's flexing when your rig is vibrating. Stiffness counts. Weight counts. And the dampening characteristics of the leg material count. Of course carbon fiber is at the top of the heap for leg material - stiff, and it damps really well.
But, even a big ol' aluminum tripod is going to be good if you can easily get it to where you want it to go. Not that I use alu any more...
My longer lens is a 150-600mm. I wasn't happy with a ball head under this lens. If you let go at the wrong time the lens would keep on going and maybe take the rig down. I don't think I'd be happy with any ball head, heavy duty or not. On the video side, we have counterbalance springs in heads to deal with this.
I ended up with a Wimberley Sidekick on a standard medium-weight ball head as the rig for the 150-600, and have been totally happy with it.
I'd consider the GP to be a medium-weight head in performance, even though it does weigh less than comparable medium weight heads. Putting it over on its side in quasi-gimbal mode wasn't enough for that lens. But, the Sidekick *is* great in that head, (except the GP is usually on my light-weight tripod). The bigger leg spread is important under a long lens!
GP pros: Light. Medium capacity. Good ball tension adjustment, good separate lock on the ball. Cleanable without disassembly. Quasi-gimbal mode is good for a telephoto, but maybe not a super-telephoto. Great upside-down mode for panorama work (carry an allen key). I love this head!
From the upper left corner of the U.S.
Photos, Video & Pano r us.
College and workshop instructor in video and audio.
70D, Sigma 8mm, Tokina f2.8 11-16, Canon EF-S f2.8 17-55, Sigma f2.8 50-150 EX OS, Tamron 150-600VC. Gigapan Epic Pro, Nodal Ninja 5 & R10.