just thinking if you had changed to a caliper yet or not, as I have been asked several times over the years about rotors/disks to suit x,y,z porsche caliper, but they have a very deep pad swept area like you often dont get on 2-piece rotors.
The LCR pad sweep is ok for a lot of applications tho.
Bigger is leverage hence more braking obviously, as is pad material etc.
I dont run LCR, I do run my own 330mm 2-piece which is for the LCR kits I do however. Started using AP's due to name/rep etc, but reality was they cracked on me, twice and life was just too short from them. Changed to a.n.other make of rotor which is an AP pattern, and all was well again. (and priced just over 1/2 an AP, which does'nt hurt the wallet so much)
I have been approached by an offshore company to use their big brake kits. You can see them in my section. They are big arsed things. I cannot speak from actual experience of them tho, yet.
AP's are an option, slim calipers in the main. You dont want to get too carried away with the pots, as you still need a master cylinder to move them without too long a pedal. more pots more seals... So long as good pad control and even pressure, all should be well.
You are on 18" OZ yea?
regards
bill