z1 stock brake upgrade, rotors, hawk pads, ssline...they feel night and day better... I wouldn't really understand why you would pay for a upgraded caliper unless you constantly go 120mph and cram on the brakes...for dd and back road spirited driving enthusiast this is what you want...

 

Stoptech street pads.

Pretty big name in big brake kits in this community.
Cheap, little dust, lasts a while and brakes well.