Brake Balance help

[XLexusTech]

Hi, I am already working with a great vendor here on my brake purchase but I am looking for some outside opinions.
I am looking for advice on a floating rear brake caliper that would balance well with a C6 Big brake (6 piston 14 inch rotor) Manual brake combo.

Aftermarket is OK but I perfer to use OE. like GM, I was and continue to look at a using Toyota/Lexus rears but was that is all R&D on my side as everything would be a one off (mounting ect..)

Thanks in advance