Brake pad material should also be considered. It might be worth your while to investigate more specifically how brake pads and steel rotors interact, and what a warped rotor really is.
If you're rarely using brakes, but when you do use them it's fairly hard, a soft organic compound is not the best match. If you're light on the pedal with occasional hard braking, an organic compound would suit better than a semi-metallic or full metallic.
Anyways, do some research on braking systems, and find what suits your needs best. While 25K isn't bad for some applications, you should easily exceed 150K (km that is, in case anyone wasn't pay attention) for the use your car sees. IE, the brakes should fail after the rest of the car does.
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