From what I remember, Parts at foreign auto are probaly going to run you?
Brembro Drilledrotors front $140-170
Front pads $50ish
Rear rotors $100ish
Rear pads $40-50ish
Your looking at $350+for parts alone

*THE STORE IS AUTO PARTS INTERNATIONAL* NOT Foreign auto

 

This is a decent article to help everyone decide what to get.

http://www.stagefourmotorsports.com/tech_rotors.php

 

As far as the poor rain performance goes, I think it has to do with glazed pads and rotors. There can be no logical explanation that accounts for poor performance in the wet other than that.