I recently installed a few of the Nuvico DVR's you listed. Personally, I think that they were great. The interface was very aesthically appealing and easy to navigate. The DVR itself looks extremely nice as well as the picture quality. This was paired with a few of Nuvico's cameras, which had one of the best quality pictures I have seen on lower/midrange CCTV equipment. Anyway, I would recommend them b/c everything about it was extremely nice. Lots of features and all that jazz. I can not comment on the build quality though, seeing that I just recently got my hands on these. Like I said, the build quality looks great, but who knows about the components.
For reference:
I have installed 2- 4 Channel DV3 and 2- 16 channel DV3 models. One of them is hooked up to a network so they can be viewed from a remote location. I have also installed a few of Nuvicos basic indoor cameras as well as outdoor and a few PTZs. Everyone who saw them were impressed by the quality. I have tried quite a few other DVRs in the same price range and they don't compare.
