...but, speaking as the owner of a RG/black Lange 1: pick the PP.
As lovely as the Lange is, it is not particularly easy to read in RG/black. The 'Stealth' is a different story, and doubtless the 'Darth', WG/blue hands or YG/YG hands would be more legible also.
Good luck to your friend.
Cheers,
pplater.