I'm looking to upgrade my old worn factory speakers with some budget replacements. I have a older Kenwood deck in there that will stay for now. Are the rear speakers on the hatch 5x7? If so, will a 6x8 fit in the same location without and modifications? I believe the door speakers are 5 1/4 and wondering if a 6" will fit without any mods. Anyone have any recommendations on speakers that are less than $75 for the pair so $150 max for the rears and doors. I'll upgrade the dash ones a little later.