Ok i tried a search but seems everyone that does or did an upgrade went thru the whole system, I decided to go with the rear speakers first and went with the Alpine sps-717's once i installed them and put the fader to the rear they weren't what i expected. I had to go over 3/4 volume just to get any sound out of them, my question is without doing any upgrades whatsoever except the speakers what would you recommend for the rears keep in mind ease of fitment and bolting right in with good highs and some thump to them also thanks.