Hi, i would like to know someone experienced opinion what brand and model to choose. I live in an high-rise condo and have about 20km view on nature and buildings. Would like to watch close and far objects so long zoom is neccessary. Day and night time, so low light performance is important too. Is it wort to look at some hikvision /dahua models or what u recommend? Also is it better to go with 8MP ( for more digital zoom) or stay 2MP? The budget is 4000$. thanx for suggestions