Brake discs - which ones ?

My ZX6R is going to be 90% track only and I need to change the discs anyway so was looking at Brembo or PFM. Anybody got any strong feelings either way ? Don’t need new calipers just discs and a fresh set of pads and fluid.

I know both are good and will do the job but Brembo are more expensive for some reason. Don’t want wavey discs, just want a proper, quality pair of discs which will work on track days.