I had a B-17 on a road bike with about 6cm saddle to bar drop. Horrible. It's on my commuter now, and it's fine.
I really wanted to like Brooks, so I tried the Swallow Select. I really loved it at first. But I couldn't get it set back quite far enough. And the more broken-in it got, the
less I liked it, oddly enough. It just felt like a total hammock, and it creaked. I tightened the tension bolt, it would be fine for about 200 miles, then it would creak again. Then it got wet in a freak rainstorm and I had to let it dry out for a few days. Then it was fine, until it started creaking again. So i gave up on it.
I ended up with a Selle San Marco Regale. It's really firm and supportive, and has a similar shape to the Brooks Swallow (I liked the shape, just not all the "quirks"). The longest ride I've done on the Regale is about 55 miles. And i had no pain during or after. There are a couple of other saddles I'd like to try, but I don't see any reason. I like this one a lot.
Here's a pretty good review:
http://www.bikeradar.com/gear/catego...ing-team-44465