I'm looking for SOMETHING to upgrade my current low-end Manfrotto 190 CF legs, and naturally I'm looking toward a Gitzo. I have a nice B-1 that I would continue using. The main things going on it would be a Nikon D800-class body with an f/2.8 zoom(or smaller prime). 70-200 or 300mm f/4 would be the largest on it. I might one day want to be able to stick a 300mm f/2.8 on it, but don't have that now to put on it. I'd like something that can occasionally handle a Hasselblad 500+150mm Sonnar and/or Pentax 67 w/105mm, but I'm also content to use a separate tripod for those if I can't get it all. The Gitzo range confuses me. I value light weight, but don't necessarily need something super compact when folded. I think that leaves me at 3 sections, which is an arrangement I've been happy with in the past on other units. I'm 6'2" and don't want to extend the center column to work at a comfortable height. I'm not averse to used(I prefer to buy that way) so can someone help me wade through the list of available options to find the right fit?