07 Pontiac G6 GT Coupe

New guy here. Don't know much. Need someone to school me!! My G6 is all stock. has 3 door speakers and 2 rear woofers. On the doors is a tweeter and what appears to be 2 mid range speakers (1 larger than the other) then 2 6x9s in the rear. I've been looking into 2 way component that comes with the tweet mid and woofer.dont think I'll need the 2nd set of mids but could be wrong? Or should I get 3 way component? Would prefer pro setup not for compitions but because I want good quality sound. I already have 4 15inch cvr kickers and haven't checked into yet but I know I'll need a 1ohm amp between 2000-2500 watts. Again id like high quality for the best results. But don't know if that'll be enough power for the 6-8 speakers inside plus the 4 15s. For a deck I'm looking into a double din touch screen with GPS Bluetooth AUX USB and video playback (might install backup camera)... Basically I'm looking for some guidance in my journey into the car audio world. What's good, what's bad, what to read, what to try.. TIA for any help!!

Also I have steering wheel controls for the radio and a DIC display but I don't really care for that stuff. Have standard key, no remote to lock or unlock car.