What are people's thoughts about a potential step-up from Dahua/Hikvision/Chinese cameras? I've overall been happy with my Hikvision/Dahua cameras, however want to maximize image quality for a front-facing overview camera on a house, and am willing to pay a bit more than Dahua/Hikvision if noticibe image quality improvement is available for 2-3x cost. Vivotek? Avigilon? Something else?