scarpa, I think you're forgetting about the brake pads themselves. Sure the X-Drilled rotors won't do much unless you really get them heated up, but most people tend to get performance pads with their new rotors, and THATS what makes the differnce. I got Axiss pads with mine, and the braking power has improved somewhat.
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Stormy
'98 SE(R) w/ HS CAI, HS G3 Header, Custom 2.25" Exhaust, JWT S4 Cams, UR Pulleys, KYB AGX's, Eibach Spings, Courtesy F&R STB's, ES Mounts, ES control arm bushings & shifter bushing (NI), Brembo X-Drilled Rotors w/ Axxis MM Pads, 205/50 Pirelli's, Nis-Knacks goodies
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