Mrrzy, You might also be able to reduce these noices some using the sound board:
If you cut the high end just a bit it should reduce the scratching
If you cut the way low end (several systems have a low end rumble button) it reduces wind/breathing noise
Finally, if you reduce the trim and turn up the slider, the lighter noises won't be picked up...it makes it harder to play subtly but if you play/sing deliberately it will not pick up the incidental sounds as much