I've got the WACD-200DN. I've got it over looking the parking lot at my apartment, to keep an eye on my car (had it broken into one too many times). I am pleased with it, but then again I am only using it for personal use, not professional.
At night it auto-switches to b/w as you know, and while it has some snow, etc... its still good enough for me to see whats going on.