Dahua IPC-HDBW4231E-ASE
Has alarm and audio IO plus supports these alarms internally (Tripwire, Intrusion, Object Abandoned/Missing,Face Detection). WDR and starlight features are great and h265 support. All these things are great to have.
Only concern is if the IR will wash out faces at very close range, need to get advice based on where you locate this camera.
Hikvision DS-KB6003-WIP
Manual states it supports jpeg, rtsp and movement alarm events, but no button pushes from users feedback (see below). Have no idea if this camera will work in the binding as this may not have the API implemented, google for more info..
Since it does not alert you to the button push you can use this trick..