Cuir d'Arabie - I own it, BA and Black Musk and Cd'A is the clear winner for me. I'll order it again when my 50mL is gone.
It's a deliciously decadent leather fragrance that out-masculines Knize Ten and any other leather fragrance you care to name. Unfortunately this overtly masculine leather reduces its versatility, but who cares when you smell so damn powerful?!
Black Musk is very nice, too, with its oily animalic accord like a dialled-down version of that in Fahrenheit.
Black Aoud is good, but not very wearable and has caused more than one person to say 'you smell like musk sticks'.
I'd take NdN or Oud Ispahan over another bottle of BA, but I'm still happy with my 50mL.
All the Montales I've tried have raw power going for them - way more concentrated than any other non-attar frag I've tried.