For years I had a Slik U212 until one of the clamps cracked. Not the sturdiest tripod, but really versatile. I replaced it with a Vanguard Alta Pro C283CT. I like it a lot. Versatile center post options. When i got my DA 150-450 I also got a Vanguard Auctus Plus 323CT. It's a beast. It has detachable rubber pads so you can use it on smooth surfaces.
I do have two Vanguard ball heads too, The ball heads work great, but I prefer pan and tilt heads so I have been casually looking for one. Here is a shot of the Vanguard Auctus with the hard rubber pads attached.
The gimbal head on it is a Nest. I also have a Lensmaster and a Promaster gimbal head too. I had a brief period of GHBA. They all seem to work fine.