speaking of speakers that can handle gobs of power, diamond HEX components are crazy! To give you an idea of the power they can handle, i have my m3 coaxial 5x7s running with 200rms, 4x the power rating, and they sound awesome x-over at 80hz!
HEXs are rated 20-170 watts, are bi-ampable, and they make it really easy to add on a 3rd midbass driver. All of the speakers mentioned here will make your ears bleed, but these are the bomb