Well, I been agonising over this as well recently... Trying to find a one size fits all (for general and travel use) proved fruitless.
So I picked up the following:
Manfrotto 391RC2 Photo/Video Pan & Tilt Head, which may be too heavy for travels, so may end up picking up something lighter as well.
Manfrotto MM294A4 Monopod, which I will likely take on travels, despite being relatively heavy for monopod
Manfrotto 190 XPROB Tripod, which will not be used for travel
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Decided to stick to Manfrotto because they seemed to be pretty well regarded, and have readily available accessories, but they were a bit pricey all things considered.
Not sure if was a good choice, but hope so.
I am still likely to pick up a Joby Gorillapod for travel, and need a larger backpack that will take some of these while still being suitable for carry on.