I have the stock city speakers in the front doors and 2 600W Sony '5 way' speakers at the rear, you will need to get a wooden plank for these speakers as they go behind the seat not in the doors.
I also have Pioneer AVH175 player (crisp clear sound), a Korean 1200W amp and a JBL woofer in the boot. The sound is excellent and really loud due to the 600W rear speakers instead of components in the doors. Let me know if you need a guy to install.