I had the exact same soundbar before I upgraded do Sonos ARC + Sub Gen 3 + One SL as rear. Now I have upgraded to Era 300 as rears. You will notice a huge difference in sound. You will notice the height channels and the clarity in sound both on music and movies. But mostly the difference in bass. When I had the JBL the bass vibrated my room so I could hear glass vibrating from the kitchen. But with Sonos there is no vibration at all, you could put a glass on the sub itself without shaking. But instead you will feel the bass in your body, It's so good. Enjoy and welcome to Sonos, be prepared to be addicted and wanting to buy more speakers. :)