Have you already been professionally fitted? If not, it may be worth a visit to your LBS.

What Brooks do you have? I went with a B-67 because the smaller saddles put too much pressure in that area. Of course I ride more upright (hybrid) so it may not apply to you.

My LBS gave me a little tip I didn't know about. When you're mounting the bike stick your booty out as far as you can when you sit down, then slide it forward a bit until you're comfortable.

Good luck