I ordered powerstops for $99 a piece from Summit Racing, in the larger 278 MM size for a cooling, looks, and stopping power upgrade.
I have also read that the Powerstop rotors warped, but please remember that ANY rotor warps if your calipers are sticking, esp. in racing conditions. I don't plan on doing any SCCA events with my ATX SE sport.......
besides, if they warp, I'm returning them, simple as that.
Gold Cadmium plating is VERY nice.........
BTW the bat kit is a bit of a rip-off IMHO. Read under my thread about the Greenstuffs in BRAKES about my kit I put together.