Everywhere I looked people said putting them in the rear wasn't worth the effort because the difference was minimal.
To me it's personal preference. I would rather hear the music "surround sound" than just from up front and that's why I changed out all four of mine and what a huge difference it made. Actually, it's not that big of a pain to swap out the rear speakers, it's just time consuming.
2014 Ruby Red V6 Premium w/pony package, Magnaflow Street axle-backs, LED license plate light, LED interior lights, Strip LED trunk lights, MMD Hood struts, SCT X4 Tuner with Steeda tunes for life, Boss 302 strut tower brace, OEM extended range remote start, Raxiom Navigation.