Assuming OE brakes are balanced, and when you slam on them ABS kicks in, bigger brakes won't be worth the cost unless tires are included that do not skid as easily. Very similar to increasing HP/TQ and then burning the tires off instead of getting traction.

I changed to slotted/drilled rotors, stainless front lines, higher boiling point fluid and left it at that even though that is mostly feel good stuff. I'm not going to bigger tires (staggered 87s) and already have sticky tires. Needs to pass the value equation of cost verses benefit, doesn't in my circumstances.

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X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior
Dallas