Blew a few speakers in my 2016 Chrysler 300S w/ Beats by Dre - Recommendations?

I recently discovered that my rear speakers are blown or close to (not SUPER savvy when it comes to speakers) & also my front passenger is distorting at medium-levels on the high-end sounds listening to 70’s rock.

I love this car audio setup & it’s still pretty great until I get into the top 90% or more of the volume limits. Also, I wish that I could play my music slightly louder. The stock subwoofer is perfect for my preferences.

I like to listen to all rock music, alternative, some pop, some rap, & love oldies & R&B.

So, I prefer quality over the most bass or pure volume.

With all of that said; Should I just look for replacement speakers of my stock sound system? Or is there something that isn’t crazy-expensive I could upgrade to OR could I somehow push this sound system louder with an amp or something?

Any guidance is truly appreciated!