what are the current brakes? original or aftermarket? what brand? If you have some cheap aftermarket pads - then fitting a decent set of pads will be beneficial.
What are you expecting to 'upgrade' in regards to your braking performance?
Deceleration/wear/fade resistance/noise/dust etc..
If you are looking at reduce your stopping distance (increasing your decel) - The standard (correctly functioning) brakes will be able activate your ABS so you should first fit decent tyres as the brakes aren't the limiting factor.
The main reason to fit bigger brakes (like the 370mm performance pack Brembo's) would be for improved fade resistance - for repeated high & speed heavy braking, like on track. They would also give you a better/firmer pedal feel.
I would be honest with your usage vs the cost of any change.