Help me pick out a subwoofer for this amp...

[rawfuls]

Hey did get hooked up.
I wish you had told me earlier.

He wanted some speakers still, so he brought me Pioneer TSD6802R's to put in all around.
Ended with 4 Pioneers, and the Boston sub.

He loves it.
It was my first time really playing with an external amp (I have a powered sub for those who don't know), so it was really difficult trying to tune it; but I think I got it sounding great.

Thanks guys for all the help; when I get a new car, expect some more questions! :)