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when im doing normal driving they are as smooth as i could want them, but when i brake from rather high speeds (130 or so) i can feel them (what feels to me) pulsing or something.
my first thought was maybe there warped but if so, wouldnt they do it all the time, not just when very hot?
Sounds like the ABS turning on ... if you are feeling the pulsing through the pedal .... especially if the "pulse" or vibration rate remains the same regardless of vehicle speed. If the rate of the "pulse" varies with vehicle speed, then you do possibly have a brake problem.
If you're not sure exactly what ABS feels like, make it work for you. Slam on the brakes to get ABS to kick in just so you know what it feels like, then compare that feel (and sound) to the problem you're describing. And do you feel it in the steering wheel too, or just the brake pedal? Do you feel it in the whole car?