I don't mean to rain on your parade, but...something to consider is I would imagine a G&H built to order rifle is going to be around $10K, and I think alot of people will have a hard time taking something that is that expensive into the field. If it is what you want, well, that is a very cool thing, that's for sure, sort of like the "glory days" of Hunting, post WW2.
Since you are new to hunting, and if the G&H might be a bit ambitious a beginning, maybe give some thought to a production version of what you are looking at, something like a CZ "African", Ruger, and so on.
Good luck on your many choices.
Mark