Sorry to say man, you're just wasting money. I have my front components amped and I can't even hear my rear speakers, not that I need to, cus I have a very loud and clear sound stage in front of me. That's a waste of money on amps, and speakers bro. Rear deck speakers don't provide good sound, although it does help subwoofer clarity by removing them.
Yes, what you're saying will work. It'll just be a big waste of money, and they're much better simpler alternative options with proper installation techniques.