I would think it would have to be AP or VC. BP, as wonderful as they are (and I have one) have a brand recognition problem I believe among everyone but the hardcore collector. I also don't believe BP is an equal to either PP or Lange. I think along with Chopard, VC, which has very nice dress watches is a great choice (although as to AP, this is probably just a bias for VC on my part)
Good luck to you.