Warranty vs. Stereo

Hey everybody I got myself into a bit of a prediciment so I thought I would post it here to get some feedback. As some of you know I bought an extended warranty when I got the car, it still has about 21k left on it and basically covers everything. However by doing anything aftermarket it will invalidate that portion of that warranty.

On the other hand I have a very nice stereo setup I took out of my last car that would sound GREAT in the suby. I listen to music all the time and hate crappy quality sound. I have already replaced the fronts and the tweeets but I dont think this will affect my warranty. My concern is that I pull out that deck and replace it with my own and then something happens to the electrical system, which I can ill-afford to repair, and the warranty wont cover it.

What would you do?

0260N4