Speaker Upgrade - Kicker CS vs something else?

2017 SR5 4 door. Running Alpine ilx507 and Subaru kicker tweeters. Stereo has 16w x 4 RMS not interested in adding an amp. I see a lot of people putting in kicker CS series 6x9s on front and 6.5's in the back. Are these the best value option? I'm looking for a decent sound upgrade from my stock SR5 door speakers that won't break that bank and sound good without an amp!

 

I did a whole Rockford Fosgate Prime setup with tweets for $100 from Crutchfield Black Friday a few years back. May check that out if you can wait. Runs pretty good on my stock setup.

 

I did Infinity Reference for front and rear and the Metra plugs from crutchfield, and DS18 Tweeters off of Amazon, and it made a huge difference!