to me....without the rear sound the car feels like it's missing a lil bit.....but i kinda prefer to hear music coming from behind me....i've always liked how that sounded better....so i dunno.

I'd at least throw a solid set of coax's in.

 

personally i've always gotten used to rear fill in my cars because before i seriously got into car audio i was cheap and found that a lot of the time it was easier just to make a box and throw some rears in, rather that cut at the cheap *** cars i was driving then...
now of course i realize how foolish i was, cuz i've made myself think it sounds better coming from the rear, i must change myself!!
but yes i've come to the decision that when properly tuned and volumed rear feel is a good addition, but you must get someone that knows how to do it to do it for you...