So the analog DVR does not have remote viewing or a mobile app? I am trying to understand what is motivating the change?
Chesapeake & Midlantic
I like the Bosch Divar-5000 series. Relatively cheap, pretty easy to set up, looks good, has a very decent app.
Alternatively, the Digital Watchdog VMAXFlex series is pretty decent, too. Setup is less intuitive but the software is more flexible. iPhone app is actually a little more reliable.
Full disclosure: I sell both of these products, but of course you're free to buy it wherever.
Axis had a new 16 channel encoder out for integrator costs of about $1100 (M7016). This makes it $75 to convert analog to IP. Most VMS charge per stream, but Exacq only requires 4 licenses for this device (not yet approved but you can use RTSP or ONVIF), bringing it to <$120 per channel plus the workstation/server (2 TB Windows 7 i3 with SSD OS drive about $700). Beware of coaxitron type control for PTZ cameras, since this would require a protocol translator. Integrator cost of $2000 for IP solution to replace a $6000 original integrator cost DX8100/Intellix-500 GB with room to expand for more IP cameras. (Of course, Pelco/AD charged you an extra $2000 for 2 TB of storage over 500 GB). (Hikvision 2 TB DVRs are about $1000 integrator cost and have decent software/apps and come with extra SATA cables for expanded storage. Beware, they only allow 24 video streams total via all remote clients connected)