I used to use the Gitzo Set up, and not a lot wrong with it I feel, but, a "friend" of mine sent me a copy of the RRS Catalogue, the rest is History as they say.
I have a similar set up to that Neuro has detailed, except as I'm 6' I have the RRS TVC34L Tripod, I do have the RRS PG02 Full Gimble from RRS, but I found on Safari the "off set" method it uses to support the 400/600, puts too much pressure on the leveling base & the whole rig eventually tilts (you can remove the levelling base but sort of defeats the purpose of having a levelling base), so I've gone with the Wimberley II Gimble, seems to work for me better.
I've also added a RRS B2AS II clamp to the Levelling base, then on the Wimberley Gimble & RRS BH-55 Ballhead I've fitted the RRS Dovetail Plates so everything can be fitted/removed quickly via the Clamp, not having to unscrew/screw gear on/off.
You may also want to look at the RRS Safari Rig system, utilises a Monopod fitted with a Clamping system that's perfect for clamping to Pipe etc, I again use this Rig almost exclusively on Safari.
You can download the RRS catalogue from their website, I've found their gear is just superb, Engineered exact, does the job, only issue is it's not the cheapest, and the Catalogue will draw you in, I'm possibly the worst case being a retired Engineer, turned Photographer, cant resist the stuff.