You might consider not getting a Brooks, here's why:

I had a B17 Narrow, thought was great because of how supportive it was. But it was like 600g.
I got a "Merek" carbon fiber saddle from eBay for $100 with a width that suited me.
I find it just as comfortable as the Brooks.

Brooks are very nice, but they are just unreasonably heavy IMO

The difference between 100g and 600g is over a pound, and you will notice that.