Beat Sonic & replacing stock speakers in JBL HEV

Has anyone ONLY replaced the JBL speakers (front doors and rear doors) and installed the Beat Sonic 2t3 or 3t3?

Just wondering if installing the Beat Sonic and replacing the speakers (woofers?) in the front and rear doors would be worth it and get me much better sound.

I also considered replacing the 4" speakers in the corner dash as well, but I was going to leave the tweeter in the A pillar alone because I just want plug in replacements and all the tweeters I have found MIGHT require more work than plug and play. Please correct me if I am wrong.

Any and all thoughts are welcome.. Been lurking a while, just picked up a HEV Limited with JBL and the stereo system is pretty meh.. I no longer want to spend $2k+ ($5k) on a new stereo, but I DO drive about 25,000 miles a year and spend A LOT of time in the car, so anything to help.

Thanks
Ryan G