So I have 2D grand prix with after market DVD player. My first pair of speakers were pioneer 240 watts 5.25"

Wasnt so loud so I bought Pyle 6.5" 400 (which btw I heard that it can fit but t didn't really. I figured something out. )
Even worse

How can I make my car sound clear and loud???

I have a sub in the trunk. But I can hear myself when volume is at the top.

What speakers should I buy. Post links to amazon or something. I'm tired spending money on bad speakers.