Ha, yeah, that's why they were on almost every high end to mid range bike until the 80's?

To the OP, creaking may or may not be the saddle. Are you sure it's not the seatpost or stem? I'd re-grease both. Did your saddle come with a rain cover? Most Brooks saddles do. If you want a similar fit and feel, but a more waterproof saddle, you could try a C-17. I just got one and it basically feels like a regular Brooks. I believe it is very slightly narrower than a B-17, but not much.