Please remember that XVR have very basic support for IP cameras..
In most cases they don't support any AI features from IP cameras even when that feature is implemented in camera.
So if you want expand and add IP cameras, simply better is replace analog cams and buy normal NVR...
What type of chassis - turret or bullet...
Fixed lens turrets from all IP series have mostly the same size..
if You want bullet - look at 2-series and 3-series line of IP cameras - there are many very fixed lens small bullet cams in sizes similar to analog cams..
WizSense Series
www.dahuasecurity.com
WizSense Series
www.dahuasecurity.com
WizSense Series
www.dahuasecurity.com
WizSense Series
www.dahuasecurity.com