Well
@brightnight there is
It is a box camera, which means:
* you supply the lens
* it is not weatherproof and must be put in a weatherproof enclosure if used in conditions where it could otherwise get wet
It does claim to support IR (
Day/Night(ICR)), but I'm sure this impacts the lens requirements to some extent, and I couldn't help you choose a lens because I don't have any relevant experience with box cams. You would need a lens with good IR-correction (because the focus point for IR and for other visible light is different) or a powered varifocal lens that could automatically be refocused under different lighting conditions.
This cam does claim to have a built-in mic AND an audio input so you could use an external powered mic instead. It still isn't capable of exceptionally high bit rates, but the large sensor should otherwise be capable of quite good image quality, especially when paired with a high quality lens.
While the cam itself can be had for under $1000, you would probably exceed $1000 by the time you had a decent enclosure and lens for it.