Hey OP!
B&W started using top grade Mundorf crossover parts by the time this speaker came around.
I really wouldn't do this unless you actually wanted to get into more advanced things, like converting it to fully active, or re-thinking some of the design decisions.
Otherwise, I strongly suggest you keep what you have, or trade it for something you like better.
Older series of B&W however, sure. :)
Best,
E
