Being that this is a Japanese car, most of those brands don't manufacture pads or rotors for it. I have used Zimmerman on the e39 and honestly, it was no better and possibly slightly worse than the OE branded parts. Just that they were quite a bit cheaper so that was a plus.
For Mazdas, and most other Japanese brands, the only choices outside of OE are usually Centric, Brembo, Akebono and EBC amongst the larger name brands. Also, it's not just the grip of the front tires, more aggressive pads make a significant difference in braking power AND pedal feel as well. On my old SC400, I experimented with a few different brands, some made the pedal feel worse and more vague than stock, other more aggressive pads gave it a confidence inspiring bite as soon as I depressed the brake pedal.
Zimmerman IS an OEM supplier for BMW, and many other European brands though. They are simply cheaper, rebranded Brembo plain discs. Great stuff.
Pads will make a difference, but I still think it is more important to just have good tires fitted. High performance brakes are not necessary unless you drive the shit out of your car. I am just dissapointed with the OEM brakes on our cars which warp far too easily.
If anyone is interested, here is a great thread I started on a different Mazda forums where I had a lengthy conversation with someone who worked for Ferodo, a European pad maker and he went to lengths to describe why these dusty German OEM pads are better than regular ones. Very interesting read: https://www.mazdas247.com/forum/show...-Brake-Upgrade
fortunately, there are some German pads available for our cars, namely Textar (Which I have on my BMW, is dusty as shit but an excellent pad)