I know a lot of people have talked about this...I just need to know if I upgrade will i need to

A. lose the DSP altogether
B. Replace it with a aftermarket amp...If possible use the stock speaker wires.
C. Use my head unit to power all my speakers and sub
D. Somehow use the DSP with my DNX8120

I am a little slow when it come to this stereo thing.
Speak real slow...LOL

Thanks

Scot