My two cents.
I prefer turret, or eyeball, style cameras over bullet style. If you're using the onboard IR with a bullet camera it becomes an instant magnet for spiders and flying insects at night. Domes have similar problems along with the dome, eventually, getting cloudy due to IR and UV from the sun. If it's always in the shade that won't be much of a problem but the IR/bug problems are still there.
The arrangement of the lens and IR on a typical turret/eyeball camera tends to keep the bugs away from the lens. It's not perfect but a lot better than bullets. I typically go on spider patrol on a weekly basis for the bullets I bought before I knew any better and only rarely have to do the same for the turrets. Last night I did have to clean up around a turret because a LARGE, about 1" body, spider was busy building a web about a foot in front of it and I do have the IR turned on in that camera. That's the first time in almost two years I've had a spider problem around it.
My favorites are the Dahua IPC-HDW5231R-ZE, IPC-HDW2231R-ZS and IPC-HDW4231EM-ASE. The 5231 and 2231 are both turrets with ~3-12mm varifocal lenses. The 4231 is a fixed lens, 3.6mm, bullet that is concealed in a tree where a turret won't go. The 2231 is a lower priced version of the 5231 and does not have multiple streams or built in audio. All are capable of excellent night vision without IR. My "weathercam" is a 4231 and the IR is shut off due to lots of available light from street lights. I can leave it in color mode, but the gain gets too high which makes motion tend to blur at night so I swicth it, along with all the rest, to BW at night. They are all 2 megapixel, 1080P, cameras.
I know cameras with much higher pixel counts are available, but 2 megapixel sensors seem to be the "sweet spot" for night vision. It's a result of how much light actually strikes each pixel of the sensor. A physically larger area will receive more light. For example, assuming the same diameter sensor, a 2MP camera will receive twice as much light per pixel versus a 4MP camera. This is a very rought explanation, but it does apply fairly well. There are a few, new, models out with higher resolution and larger sensors, but they are more expensive, x1.5 or more, and still don't perform quite as well at night.
Since I'm setup for video surveillance I'm using Blue Iris with a PoE switch and a separate subnet for all the cameras. I've experimented with other brands with, usually poor results. Hikivision is also an excellent choice, though, and their "Dark Fighter" series is on the same level as the Dahua "Starlight" or "StarVis" series. Yes, Dahua and Hikivision are more expensive, but if you want good, reliable, performance, especially at night, they are an excellent value, good bang for your bucks.