I have a 2003. The front's have literally no room to play with. I put 6.5 infinity kappas into mine, but I had to make an angled spacer and even then I barely got the panels back on. Along with the spacer, I had to remove the raised part on the back of the door panel that went around the stock speakers, but I got them on and you can't tell there's after market stuff in there. It wasn't easy though. There's less than 1/4" between the speaker and the window when my window is rolled down.
For the rear speakers I dropped a 1/4" MDF spacer down into the door (through the window slot) and mounted my 3.5 speakers to that. I then mounted the spacer to the INSIDE of the door. Once again had just enough clearance between the magnet and window. Door panel fit without a problem like that. Mounted to the outside of the door, the door panel wouldn't go back on.
I have some pictures at home of what I did at home. It takes more time than normal and some creativity to get stuff into that car.