I'm looking for a sub. Need some export advice....

Requirments:

2ohm load for amp(can be dual 4 coils)
1000W power handeling
high efficency
12" dia

I want a dymanic sub that can handel power when I turn it up

I havn't set a budget yet, no idea what it'll cost. I'm acustom to good bass
from my home system. I would like to try and match it. I'm not looking for
the typical car stereo (ie 20dB of boost from 150Hz down, lol)

Also, I live in Nova Scotia, Canada, I don't have access to many brands. Any
reputable web-vendors??

Thanks,
Sorry for the "what sub" question