I upgraded my brakes last spring, got new brembro blank rotors for the front, Hawk HPS pads all around, SS lines, some decent brake fluid which I forgot the name of, and last but certainly not least did the H6 rear upgrade in the back. Overall, totally changed the braking dynamics of the car. The H6 upgrade seemed to flatten the car out under braking, while the imporved pads really bit in well. This all came to about 400-450 without installation, not to bad at all for a long lasting upgrade.
In actuality, probably cheaper than going through subaru and gettting new oem pads and rotors.