I hesitated between Doorbird and GOLIATH/Dahua. The latter, however, is not available with ekey. The former is, and there is a video comparing the Doorbird's own FP scanner (called Doorbird XXXX Fingerprint 50) with the Doorbird with the Ekey module. In that comparison, the Doorbird's own FP scanner performed quite well. Currently, we are not using the scanner from Goliath yet, so I cannot share any experience with it.
In my opinion, with children in the house, an indoor station is a must. Our child is briefly home alone in the afternoon, so he shouldn't open the door to just anyone. That is one of the main reasons we are installing the system.
If I were you, I would definitely favour an IP system with POE in the new building.