If you upgrade the rear to 11", you'll have major brake problems.
DO not, mess with your brakes like that, you'll end up flying arse backwards into an intersection
Seriously, the brakes are fine, Nissan OEM pads are fine too, if you want an upgrade, get something like Hawk HPS pads, or KVR.
Also stainless steel lines will help with pedal feel.
Thats about all you need.
BTW, I think mine are done
About 6 full lapping days and more than 25 x 20minute lapping sessions, my pads are done ( Hawk HP+)... and rotors soon to be, hehe