People totally underrate remaps, im hoping to get 450RWKW out of my rb30det with one(already made 340rwkw with old motor) A remap can handle different turbos, bigger injectors, modded AFM's or even map sensors. I believe a perfect remap is better than a PFC, as it has many features that can be tuned which cant be on a pfc ie, 16 rpm points for dwell time, injection end angle, two ignition maps, adjustable target AFR for closed loop in each load cell, two(or on some ecu's three)fuel maps. There are a few other bits, but i cant remember now.