Hu ??????
If you're a DYI person, if you buy a harness, it's easy to replace the HU yourself, keeping the stock Monsoon amp. I did end up temporarily putting some cheap speakers in the doors due to one of the Monsoon speaker being blown, and I'm more than satisfied with the sound.
Now if you're planning on going with something other than the Monsoon amp, I guess rewiring is the way to go.

