Community Forums:

As Scrump says, you can get the original grilles to fit if you really want to. I used the 4" Pioneers in the front and the 5-1/4" Pioneers in the rear shelf with the original grills. The door speakers look fine, but my interior is very dark blue, so you can't see anything unless you look closely (slight difference in material color where the old grill used to cover it vs. the new grill). On the rear shelf, the difference is more pronounced due to sun fading of the uncovered material over time, but you don't see this when you are in the car anyway.
As far as the sound quality goes, it is just fine for me and I suspect for most people. It actually sounds pretty damn good. But if I was to do it again, I would check into using 6X9's in the rear for improved bass response, and stick a pair of bass blockers on the front speakers. www.etronics.com has nice Pioneer 6X9's for 39.95 ($50.00 cheaper than cruthcfield!!) I've used etronics before with no problems.