Mark,
Does heid=head?
If so we're looking for a tripod head. Many photographers today have switched entirely to Arca Swiss mounts. Generally one has an L bracket on the camera, or else just an adapter with the dovetail Arca Swiss male fitting, screwed into the tripod mount. The camera can be used either landscape or portrait postion with an L mount.
I have used Really Right Stuff fittings, but one can use Kirk or Sunway. The latter are really well made. I own a large big brother to the Manfrotto plus a very light travel tripod. In each case I use a head that works with any of the Arca Swiss dovetail adapters.
So I'd look at prices of RRS, Kirk and Sunfoto. With your tripod one can level pretty well with the leg central arm adjustment strut and the length of that leg. So one needs either
No head, just an Arca Swiss type female clamp to receive and capture the L bracket on the camera or the single dovetail adapter used instead.
A leveling platform: this allows about 14 degrees of adjustment.
A rotating capability
A head with ability to adjust level and drop over from landscape to portrait if one does not use an L bracket. This can be a ball joint or else a number of screw or clamp xyz axes controls.
We discussed all of these
here and the Sunway
here.
Read those and then I'll check through my gear and make some suggestions. first you have to decide whether or not you want to go along with Arca Swiss adapters. That's the first decision.
Asher