Door speaker rattle is your stock speaker screws are loose. Mine did the same as the screw holes were stripped. When you replace the speakers, just drill new holes.
Now for your answers:
1) Good, but I wouldn't do Pineer door speakers personally. Cheap custom components sound far better for the same price. Although the Pioneers should give more bass if you never plan to add a sub.
2) My Sony 10-disc changer is in my trunk. I mounted under the rear deck. Actually, it in front of the rear deck right up where it opens. Sorry, no pics of it in current position. But, I like it there as it won't get kicked by passengers. Anyway, it's preference if your changer allows for underseat mounting (small enough).
3) While the door panels are off, go for imitation dynomat. I bought a roll of ice and storm shield from Home Depot which seems to work fine. I think it took me about 2 hours for all 4 doors. Plus I did the trunk earlier which took 2 hours to get looking good.
4) Crutchfield. They are the only ones that provide the correct plugs for the amp bypass, as well as plenty long enough. Procedure: plug one end into HU harness and the other end into the mating plug at the factory amp. Takes 5 minutes to run, less if the HU is already out.
Aaron
