Some of those Gitzo head options look really great, not a bad weight at all either. At the moment I'm thinking of picking up the Benro Aero4 and eventually swapping out the head (maybe for one of the Gitzo) eventually.
I've been looking at that new Gitzo Fluid Head for $319.00. I just don't want to be the first, so far, there are no YT reviews or review/articles as it just started shipping not too long ago.
I could probably hit up Gitzo to loan me one for a review for HD Video Pro? Maybe I'll do that. My experience with all levels of
tripod heads has shown me you have to have hands-on exprience to really tell how they will work for your camera rig and shooting style.
FWIW, I just returned from OS with Aluminium Miller Solo sticks, a Miller DS5 head all wrapped up in my suitcase. Suitcase only needs to 700mm horizontally. I generally shoot between 600-1,000 mm lens, so you should also take focal length into account when choosing sticks and heads to travel with. If you are using widish lenses under 100mm I'd look for 2nd hand Manfrotto 502 head and the cheap legs that came with them.
I've very happy with my Really Right Stuff FH-350 head on Sachtler Flowtech 75 sticks. Sets up super quick, and as the FH-350 is flat base and quick release head, I can switch to a slider setup in literally 5-10 seconds. Not a cheap solution, though.
As Rob said, gimbals or motorized heads would be terrible for precision on the fly control, such as events. I'd see them useful for filming things like architectural and landscape b-roll, not for filming people which are too unpredictable for a gimbal to keep up with well. Hollywood mostly uses manual heads, and when it is motorized, it's working with actors hitting marks, not random on-the-fly events that require the tripod to be setup in less than a minute.