6 inches fit nicely and mounting depth usually isnt a prob, 6.5's fit aswell just a lil more snug and often need spacers as ur window will hit the magnet on the way down

the rear isnt a issue u can put 6 or 6.5 inches as under the parcel shelf nothing is in the way for the magnet 2 hit

good cheap speakers, kicker or pioneer

if u got a lil more cash go the Alpine of JL u will appreciate the sound quality difference