Awesomo,
I have been using 32-Ch H.264 Full D1 Real-time DVR from a manufacturer called Ameba Technology and their user interface are pretty neat and user friendly.
They carry dvr from 4-Ch up to 32-Ch and the GUI are the same and I believed they all came from the same factory in Taiwan.
Here's a bit of spec from their 32-Ch DVR.
Model# DVR-TP32
32 BNC input
16 RCA Audio input
2 RCA Audio output
Mobile app: iwatch dvr II
recording speed: D1 realtime at 704x480 resolution.
I've been dealing with the guy named Ben in this company for quite awhile.
His e-mail ben@amebacctv.com, phone 718-886-9505
Good luck!