says...

I'm wanting to put 400 watts to it... but, I don't know what would be
the best way. I don't know how you would hook a DVC subwoofer to a 2
channel amp... or even if you can.

The instructions should tell you how to accomplish this.

Also, what are a few good brands (on Crutchfield or SoundDomain) that
would be able to power it... ?

I just bought this:

http://www.onlinecarstereo.com/carau....asp?sku=13120

on ebay for $248, and I am powering a Kicker CompVR 15. You could set
the output power down to about 3/4, and it will do nice for you. It
sounds amazing to be honest with you.