For my Linhof Techno I use a Gitzo 3541XLS (discontinued, the replacement is called 3542XLS) and a Arca-Swiss D4 head. For me this is the ultimate combination.
The special feature of the Gitzo 3542XLS is the length, 2 meters (80 inches) max height. I can't imagine having a shorter tripod as my shooting style often benefits from a slightly higher position, and with sloping ground I often need the height even if I'm not standing on something. The drawback is it's quite long folded size and weight. As a result I generally don't carry it on the backpack, but over my shoulders. With full camping gear when I have a huge backpack with proper carry system I can put it on the backpack though.
Having no center column it's a pain to use for closeup photography, but I do very little of that so I can live with that.
I went for the Arca-Swiss D4 geared head instead of the Arca-Swiss cube. It's lighter and it's quicker due to unlocking action (which I do use from time to time), so I prefer that. The drawback is that it's a bit "jerkier" in the movements when turning the gears but it poses no real problem for composition, and it's rock-stable so to me it's the best tradeoff I could find. Here's my review of the D4 head:
Arca-Swiss D4 review
I'm a bit boring for this type of thread though as I really only use one tripod and one head and have used the same over several years.