brembo uses a higher grade medal than most cheaper rotors. Basically, you can turn them an extra time or two before they're shot. Also, they're not slotted/drilled so they'll last longer. Unfortunately, they have an exclusive contract through Subaru for that size.
04 STi brembo rotors (5x100) are particularly painful. They only ever made that size for one car in the US with that bolt pattern and they didn't make that many 04 STi's...
If you look around hard enough. You can find brembos not through the dealership. I could've last time I change my brakes, but my rotors weren't shot or really worn. Even though the dealership said the fronts were warped and the backs needed turned.
Napa had the front Brembo brand rotors and I think Advanced Auto Parts carried the rear rotors [non-brembo, which I don't think the rears are brembos anyway]. That was in my results at least.
378awhp/373wtq Custom Dom 3 & CBRD tuned 2006 STI.
"When in doubt...flat out" - Colin McRae