Passive subwoofer

Hi,

I am working on assembling my own 5.1 home theater system using different parts from different manufacturers. Right now, I am stuck with the subwoofer selection.

I am planning to use a passive subwoofer, which can be used both in home as well in my car. I planning to use MOSFET power amplifier from sony, XM-502Z (Maximum Power Output: 1ch x 250W at 4) in my car. So, I am looking for a good passive subwoofer which can handle the power (max 250W) from this Sony amplifier. I am ready to assemble the subwoofer, if I get good subwoofer driver and cabinet separately.

Could any one please suggest me, which will be the good subwoofer driver and where can I get the cabinet (and subwoofer driver) or passive subwoofer module in Bangalore, India. I am looking for atleast 12inch subwoofer driver.

Thank you in advance.

Have a great day.