Cody Templeton
FRF Addict
Powerstop is just pads and rotors. The calipers are just red painted remanufactured. Not going to make a big difference. The Powerstops are still 4 pistons and the Alcons are 6. 70% of braking is done up front so I think if you just got the front kit that's all you'd need.
Although the Power Stop kit is factory sized stuff the pads and rotors are upgraded over stock, plus having fresh calipers makes a big difference from worn and tired factory stuff.