Replacing the speakers in my 2000

Hey everybody, I''m new here.
Anyway, I put a Pioneer DVD receiver in my dash a few weeks ago, now its time to change out my speakers. Are there any suggestions for speakers? I don''t know very much about them. I''ll need the two door speakers, and the two rear deck speakers. I looked on the heavily over priced Crutchfield, but there are very few speakers that fit the front door...? Help, please!

Thanks