When I upgraded my speakers in my 2000, i used mounting plates for 5.25 and comparing those to the stock 4x6, the 5.25 speakers sounded better. When I went to do the same thing in my 2005, I found the sound was not as good as the pods because the adapter plates tend to hide the tweeter behind the dash. The 4" speakers in the pods sounded better because the tweeter was closer to the grille. It could have gone with components and mounted the tweeter on top of the dash with tweeter adapters but I didn't want to spend more for the component system and the tweeter mounts. I went with infinity because they had a 3db boost switch on the tweeter. I boosted the 4" in front and did not boost the 5.25 in the overhead pods. Also the infinity speakers have a rotating tweeter in the 5.25 and I aimed them toward the back to try to even out the sind front to back and I still have to fade the back speakers to keep the sound balanced.