Longse s500. As long they support onvif should work with Hikvision NVR.
Btw, I am constantly checking for best value and IQ among IP cams and so far between Huisun v2 & Longse I did not find anything better. For 5MP cam Longse is currently as good as it gets. I would like to use it indoors as well, but it falls short in couple of areas, I don't like 4:3 format and it lacks microphone