Hello, I am new to the audio world. I would like to set up a new system in my 2006 Chevy Silverado EXT. I just bought/installed the new Kenwood KDC- X997 for starters. I currently have Polk DB 675 6 3/4 coaxials in the front doors, the stock 4 by 6's in the back doors, 2 10" Polk subs in a box under the backseat, and am powering this with 2 Phoenix Gold Octane R-4.0.2 amps. I would like to change the front door speakers to components. I'm considering the JL audio
C5–650's, or the C3- 650's. I have no idea what to put in the back doors to replace the 4 by 6's. I was planning on keeping the subs and the amps for now. I just don't know if the amps will help or hinder my new system. Anyone have any knowledge of these amps? I am open to and would appreciate any advice or suggestions regarding any of this.
Thanks in advance.