I just recently bought a 10 inch Kicker CVX104. It's already in a ported box.

Subwoofer Size 10"
Peak Power Handling 1200 watts
RMS Power Handling 600 watts
Voice Coil(s) Dual
Impedance (Per Voice Coil) 4 ohms
Frequency Response 24 - 500 Hz
Sensitivity 85.7 dB

Those are the specs. Now from a kicker family I could purchase the IX 500.1 but cost about $220. I am trying to see if someone can find me one that is probably less than 150 if possible. If not please tell me so. Or what amp would should I get for 200 bucks.