Have a read through this link, you may find it helpful.
http://sheldonbrown.com/saddles.html
As
EsoxLucius noted, it is important to have your saddle adjusted correctly.
If you want more information on which Brooks would be best suited for your bike / riding position pop them off a note and I think you will find them pretty helpful.
http://www.brooksengland.com/en/Cont...tactForms.aspx