you may be interested that many people who should know maintain that there is no such thing as "warped rotors". The braking system is quite tolerant of rotor run out, and often no warpage can be detected on cars experiencing the typical shudder/pulsing described as a "warped rotor".
The new idea is un-ever pad deposition
see descriptions here:
http://www.stoptech.com/technical-support/technical-white-papers/-warped-brake-disc-and-other-myths
http://www.mossmotors.com/SiteGraphics/Pages/brake_discs.html
And the only way to remedy it is cleaning up the rotor surface, sometimes resurfacing, or using new rotors (and bedding high quality pads carefully).
I really like Centric Standard rotors with Akebono Pro-ACT Ultra-Premium Ceramic Brake Pads and use them on all my Toyotas.
The new idea is un-ever pad deposition

see descriptions here:
http://www.stoptech.com/technical-support/technical-white-papers/-warped-brake-disc-and-other-myths
http://www.mossmotors.com/SiteGraphics/Pages/brake_discs.html
And the only way to remedy it is cleaning up the rotor surface, sometimes resurfacing, or using new rotors (and bedding high quality pads carefully).
I really like Centric Standard rotors with Akebono Pro-ACT Ultra-Premium Ceramic Brake Pads and use them on all my Toyotas.