I am going to be buying a 2010 WRX sedan (base, not premium) next month and from what I have read I am pretty set on replacing the factory stereo. I have pretty much decided on a Pioneer AVIC-Z110BT head unit, but I could use some advice on what to replace the front and rear door speakers with. Actually, I don't even know what size (inches) they are. Also, I have read that not all speakers will fit because there is a lack of room between the door and the interior door panel, is that the case? Any help/suggestions/advice would be greatly appreciated.