I replaced a bunch of standard cameras w/ IR LEDs, as well as the DVR. We switched from a propriatary Linux based DVR to a WInXP box running Nuuo. The cameras were "OK", but the quality was just not great. I look at security cams not only as a deterrent, but also as an evidence gathering tool. If a crime is committed, and you just have a blurry face, the cameras were not worth installing in the first place.