I just got a pair of Volfenhag zx-4710 10" subs. I am suprised to the sound. They are rated for 800w max 400w rms (1600w max 800w rms). As of now I have just one hooked up to a American Pro 600w amp. I am waiting on a custom enclosure and a Volfenhag zx-8200 1000w amp.
The beat is great for the price. The cheapest I found was www.audivibrtionz.com he has a pair for 89 + S&H. For me it came out to be a little over $120.00
They give out a great range. Sound great with rap, country,alternative, just about everything.