before looking into brakes, one important question to ask, apa tayar lu pakai?
Cheap low end tyre, upgrade brake pun wasted. If cannot transfer the traction well, will just keep activating ABS despite new brake set. Activation of ABS doesn't mean that your brake very power, it means that the tyre is locking up due to insufficient traction.
Myvi brake upgrade?, Recommendations for myvi brake upgrades