Pleasea check our favorite saddles thread:
http://forums.teamestrogen.com/forumdisplay.php?f=36
unfortunately there is no one solution. A lot of us have Brooks saddles
and swear by them. A lot of others of us HATE them.
The same can be said of any other saddle out there.
One thing though, you will have to build your ability to ride on ANY saddle.
75 miles at a stretch is not easy at first.. work up to it.