Small office router and AP - recommendations?

Hello,

We are a small office of about 40 people, however everyone has their own Ethernet drops, and only about 10 devices are ever connected to WIFI. We currently use consumer grade stuff, and as we transition to an AD DC, and a new office, we should also upgrade in this area.

I am thinking of getting a Ubiquiti Edgerouter 8, but not sure on what the best option would be (though I love that I can rack it). We have gigabit connection, and have three switches at the moment.

I also want to get some sort of Wifi, doesn't need to be perfect but we would like good internet for the few who use it anyway.

Would appreciate exact models being linked! Also, we currently use a Cox provided modem, should we also upgrade that?

Thank you!