If you're going to be spend on a Brooks, then get a integrated seat post/clamp without the suspension. Then look into the sprung Brooks Saddles. You can find a beautiful seatpost, Brooks, and house brand saddles at velo-orange.com.

Also, you may wish to check that VO or any store you do buy from has a return policy so if she doesn't like it you can exchange or return. REI.com is great about that.