Min wheel size for brembos

[dr_jekyll]

I used to have brembos behind 15x7 OZ magnesium wheels, ford WRC items, not very helpfull I know!

On the hole brembo vs GTI6 caliper debate, I sold my 4 pots in favour for GTI6 items, cheaper pads, easier to service/maintain, as WP says, the discs are lighter.

Weights not so much a thought for me as im driving a fat lady anyway lol.
Atm for how much i paid for these these stand to be a cheaper setup for me then gti brakes (have come with new pads). Struggled to find some local in good nic, only ones about were in scrappys and over priced! Always loved brembos so want to give them a shot.
Can you advise me on some decent disks for them as heard several opinions for disks