Just as a further consideration, independent of what tripod / brand / head one chooses.
As with any piece of equipment, my choice of tripod is purpose-oriented: for me, the reason to carry a tripod, as obvious as it might sound, is to have a stable platform to support my camera(s). This is true regardless of what I am shooting and where. I.e., I never think in terms of "well, today I'd rather carry a smaller & lighter tripod which might result in just 50% of the photos ruined than no tripod". If I am on a photo-related trip, for the kind of work I do that means that I carry a camera than needs a tripod, and in turn that means I also carry a tripod that I am sure will do the job. If my pack is too heavy, I will take out something else to lighten it, rather than even considering carrying a tripod that won't do the job 100%. There is simply no point for me to risk having 150 MP (or 50, with my previous camera) worth of micro movement in my images
For casual shooting, street, city, and so on, I carry no tripod, and carry a camera that I will use hand-held. Hence, I only have one main tripod, the RRS I posted above. Since things can go wrong, and since I do this for a living, I always also carry a second, backup tripod. In this case, even if it stays in my luggage all the time, which means I won't have to carry it around, I don't need that to be a second TFC-34. That one is a smaller one, to be used as a stopgap until I replace or repair the one that had an accident. So far my backup tripod got used only once for a few days a few years ago, when my Gitzo Series 3 self-destructed in Iceland (which, incidentally, resulted in my move to RRS)
Again, just my .02, of course your purpose might be different and consequently your approach to choosing a tripod will be too. Best regards,
Vieri