agreed, subs that can handle that much power dont just come and go.
also, you need to realize the differences between peak and RMS power ratings. RMS is what the amp or sub will run at 90% of the time, Peak power is what the manufacturers put on there to make it seem like big shit, you will not often times hit peak power. RMS is often times about 50% of the advertized peak power, but not always. Once you can see the difference, you will be able to match up better subs and amp combo's.