Few questions? What sub and Amp for this box?

I have a 2007 Tacoma access cab. I only listen to rock/ heavy metal music so looking for the strong bass with rock music.

I have been looking into buying this box

https://www.soundoffaudio.com/item.cfm/id/2426. Few questions.

What sub and amp combo would you recommend with that box?

What would be better for my preference of music a 10 inch sub or 8 inch?

I was looking in to getting a Niche Audio NW1000HO 10 inch sub.

http://www.nicheaudiousa.com/flash.htm.

I already have one of the NA60.4C amps new in the box but i am really not sure witch way to go.

I no a few people that run all Niche speakers, subs and amps, and i have been very impressed on the sound clarity and how hard the subs hit.

Any input would be great thank you very much.