I don't think the OP's desire for a Rohloff stems from it being part of a dream bike. I always wanted one, but the price put me off. One thing I would say about derailleurs is that the latest and greatest things might not be that good of an idea. 11 speed isn't that new, but I met a rider that was having problems with his 11sp campagnolo and the mechanics at the controls couldn't help him.
PBP has been finished by all sorts of contraptions. I remember when Sophie Matter passed me on a hill out of Fougeres riding a townie, wearing a sundress, and conducting interviews with other riders. And the ACP outlawed kickbikes after a number of people finished PBP on them. If you look up "PBP Drew Buck", you will find a lot of people's pictures of the eclectic bikes people ride on PBP, many of them intentionally making it harder on themselves.