Now that I go your attention, I opened up my alpine stuff just to look at them and see if everything was in the box and noticed that the door speakers are kinda big... I've asked different shops and some ell me they will fit and some say they won't. What do u guys think? (Keep in mind I have a B6 A4 with stock NON-bose speakers)

here are some pics of the door speakers (I couldn't find a ruler but Crutchfield says Top Mount Depth: 2-3/8"):