Tigger 172
RMS Regular
you dont even need rears at all really. its just a personal preference or if your wanting a surround set up for dvd. for true stereo you only need fronts.
a good set of 6.5's well installed will really reward you. then if you can amp them do so.
Do this first mate ^^^
you dont need coaxials in my opinion - amped front components are more than enough if you already have the 6x9s for rear fill