If I could start over, I would still chose Dahua and BI, that is high praise.
I think many of us agree with this statement...unfortunately many of us had the misfortune of trying the other stuff before we found this place.
I wish I found this site before I started my camera journey LOL. I started with the Logitech 700 cameras and then moved to the big box store Swann all in a box kit LOL.
I now have a box of useless cameras as I realized how poor those systems were.
Even with all the great advice and knowledge you get here, you will stumble across a learning opportunity mistake and will be able to share it here for others.
But at some point you have to quit researching and trying to perfect a plan and go buy something and start playing and testing. I doubt any of us designed the perfect system and didn't have to modify it once we saw how it performed. So until you buy a camera and test locations, and then put up the cameras and analyze it with an open mind to find the weak spots, you will have a void in the system, so buy one and get that process going.
Or an event happens and you realize you need some more cameras.
It is really easy to get lulled into a sense of satisfaction by walking around your house and watching the playback and be like "Yeah look I can easily tell it is me".
It is the total stranger that we need to be able to IDENTIFY. You need to find a way to test that.
I live in an area with lots of families. A neighbor was having a party for their son's baseball team and they were all in their jerseys, so they all had the same clothes and basically looked alike LOL. I asked the kids to run and walk around my house and then I printed out a few and tried to see if I could ID which kid was which.
That is when you realize that the DORI numbers the manufacturers provide are WAY overestimated LOL. Those are under perfect conditions with no movement. Realistically you cut it in half for day time and then cut that half in half again (or more) for nighttime.