Originally posted by moofoo
I gotta disagree on that that "rears are just an accessory". The rears give music more spatial ominance, I thought the same thing as you and left my rears stock and upgraded my fronts to MBQ's. The setup sounded great, but it sounded more stereo than music coming from 4 speakers(even though it's stereo front/rear).. when I upgraded the rears, music sounded sooo much more open. Just my opinion 
my opinion also.
i have only fronts right now, even though they sound great, having a rear fill sounded much better. i dont like to sit there and know exactly where the sound is coming from. with rear fill it i couldnt tell exactly where my speakers were, and gave it a more full sound.