What cycleops said. Try it and if you don't like it
eBay it and get another one. Don't arse around (excuse the pun) putting up with discomfort while it's 'breaking in'.
Brooks saddles come in different sizes and shapes, and also different degrees of elasticity. Spa Cycles also do some very decent alternatives. If you have a saddle that you're reasonably happy with you could look for a leather one with similar length and width.
A saddle with more give isn't going to last you as long as one with a less elastic leather (the leather stretches and eventually you reach the point where you can't take up the slack with the adjuster screw).
SFAIK, the shortest saddle in the Brooks range is the Men's Team Pro - so I'm a bit sceptical about the 'it's shorter to stop it catching on your skirt' theory.
I thought saddles with slots in them were primarily designed to combat prostate problems:
http://www.prostatescotland.org.uk/...uestions/can-cycling-affect-the-prostate.html
But if they work for you then why not. I should say though (as someone who used to own a Selle) that it didn't last very long. It might get you through 4,000kms, but might not. Brooks do something similar (the Imperial) that you might want to have a look at but I don't know how long it lasts (same basic issues - the more give the faster it stretches).