Thanks for the help guys.
Piecing all this together and seeing the costs add up very quickly makes me hesistant to pull the trigger, and all for 'just' some weight savings and possibly ending up with an even little bit wider track-width on my car.
As for brake-performance this will hardly any to no improvement over the current 11.75" C-body rotors and 2.75" diameter calipers I already have on the car.