hmm...u want a sub that won't rattle the trunk off your car and also u got a budget. I suggest u get a pair of 10" JL Audio W0.
Here are the specs for the 10" W3:
Nominal Diameter: 10 inches (250 mm)
Continuous Power Handling: 125 Watts
Voice Coil: 1.38" diameter, 6-layer, Kapton former
Available Configurations: 4 ohm, 8 ohm or 12 ohm (Single Voice Coil)
I think it's a good sub for it's price!