Colour security cameras?

["Bill Stock" <me7@xxxxxxxxxxx>]

I've got two older B&W cameras that I'd like to replace, as the resolution
is not as good as the other cameras and they're starting to get some burn
in. I've been happy enough with the other cheapie ($100+) B&W IR bullet
cams, except for the fogging after a heavy rain. I thought I'd go colour
with the new cams and eventually replace all the older cams.

I know when I looked a few years ago, the colour cams were not recommened
due to poor resolution. I'm looking at the day/night IR colour cams using
the Sony 1/3" CCD @ 420 TV lines. A varifocal lens would be nice, but not
necessary. There seems to be quite a price range on these, anywhere from sub
$100 to $400. I know some of this is due to the branding (WIDGAFA), but why
the wide price range? Anything in particular I should be looking for?

TIA