Jeremy - quite a coincidence, my main rig is C9.25 and Tak FC100DF on AZ-EQ6 and Berlebach Planet, and I sit on Berlebach Nix II. I’m quite happy with Nix, and tend to use quite a wide range of seating heights. To avoid the eyepiece on the apo to get too low when looking near zenith, I keep the mount rather high on the tripod, which means that looking closer to horizon raises the eyepiece quite high, especially on the shorter SCT.
FWIW, I’m pretty tall myself, 194 cm.
It is true that Nix II is not very compact, less so with the optional foot rest installed (which I do have and like, but it’s in no way necessary of course). But it still fits sideways in the trunk of my old RAV4 with the rest of the gear (and even some bags).
Fozzie, If you need me to get some measures from the Nix, just let me know!