Depends what SBS recommend to go with those double sintered pads

Brembo recommend Stainless with the Z04 pads and as they are for race use only they recommend the 6mm Superbike disc

I have run the Z04 with my 4 pads monoblocs. £450 a set!!
As a consequence i have looked into alternatives too.
I still like a lot the MCR from Bendix. Equivalent in the dry to be honest and about a 4th of price. Brembo only edge them in cold performance and wet performance.
I have not tried but Performance friction is said to be very good too. About half price to Brembos. Apparently Bayliss used to use Perf Friction.
And i do run the 6mm discs.