After having everything required for this conversion sitting in my shed for over a year, I decided to go the Mk7 GTI/Performance Pack route. I was lucky to sell everything and break even (even taking into account postage for some very heavy Zimmermann discs). I think
@Shoduchi helped in multiple threads for both brake solutions so
I loved the idea of the Brembo 18Z 6 pot conversion for the sheer bling and street cred, but realised the PP solution is more than enough for fast road, so in the end, head won over heart