I am debating between the Mach 1 brake upgrade kit and just getting Powerslot rotors with Hawk HPS Pads. OR I am just going to get a set of PBR Rotors and Hawk pads for 120 shipped. Has anyone ever used the PBR rotors?? The upgrade kit's $390, but then again you do get new calipers and ss brake lines. Also the upgrade kit is 13" compared to my stock 11" rotors. My calipers do have 117,000 miles on them. The mach 1 kit is the same as the Cobra Kit right except for 50 bucks?? Any opinions and pictures would help. Thanx