Okay, should get the 3620 this weekend.
I currently use a Hikvision NVR and as such have been using only Hik cameras as it's just easier. I assume once I go to BI there aren't any issues with mixing and matching cams? E.g., I like the ColorVu Hik capabilities for certain parts of my house, and then will likely go with a Dahua for LPR and possibly some darker areas where there 5442 Starlight seems to be really highly rated with IR