Honestly, spend on acoustic treatment first, then think about speakers. DIY absorption on ceilings and upper walls would help a lot.
I’m sick of bright harsh cafes where it’s hard to hear the person sitting next to you over everyone else’s conversations, who then blast me with their ambient playlist.
This! This fifty times over.
I decided on the 8340 because of the aesthetics, sound quality, and the room correction, which checked all the boxes for what I was looking for in such environment.
To be honest, who is going to notice room correction in a cafe? What they will notice is if the sound is too loud or too bright, but that gives you a lot of room to play with.
For that size room + several bodies, I'd want something with 8" bass drivers at least, if you want noticeable bass. Genelecs look nice, but for background music with be rather expensive. There are plenty of cheaper options that will perform better in this role. Whether they suit your aesthetic requirements is another thing.
BTW are you sure you aren't overthinking this?
In a cafe my main concerns is the quality of cake and tea/coffee, followed by the aesthetics and that any music isn't too loud. Everywhere you go there is music, often TOO LOUD music, the only shops free from it here seem to be supermarkets and the odd independent shop.
Why is there background (often times, foreground!) music everywhere, is it necessary, does it serve a purpose beyond distracting people from the moment/task in hand?
Unless the music is part of a theme, a jazz cafe for instance, perhaps it would be better to have a cafe without music?