ORIGINAL: TechmanBD

Yeah, that is the way I am. I would get the basic system, and replace it. I just did my mustang. I am sure nothing compared to your systems habeba, but works for me. I will post pics later.
Right now I have the stock HU.

Infinity Basslink II 250Wrms amped sub w/ the 4sc module installed that is 4 channel 50Wrms
4 Infinity Kappa682.7CF 6x8's.
Harman Kardan IPOD Drive and Play.
PIE aux rca input for HK Drive and Play.
I used the Pep Boys Lightning cable kit to hook the amp up and speaker wire

All cost me around $400.

It sounds pretty good for me. I still am in the process of getting the gains just right, and crossover just right on the sub.

I am going to see how this all works once adjusted and make the decision of a cleansweep, or something similar to it.