Wear the aftershave you'd normally wear, even if that's 'none'.
What's the point in going out of your way to impress on a first date? You'll then either have to keep up the facade for the rest of the relationship or disappoint her when she finds out what you're really like.
If it turns out that she likes you, is it not better that she likes you rather than some character you've created to impress women?
(Of course, this is moot if you're just looking for a one-night-stand shag; squirt some Chanel for Men about and wash your willy.)