Hi Andrew
For the HD-SDI encoders You have mentioned, You will only be able to get rtsp stream. The Euresys encoder is profile s conformant and will be able to connect to both ACC5 and 6, as there are no difference in conformance, but the stream you can only record continously.
I'll recommend the Dahua pentaplex DVR XVR5808/16/32S which Support HDCVI/AHD/TVI/CVBS/IP video inputs. We use them with the Avigilon Control Center and it work's well. Just be aware of the You will only be able to rename 3 out of all channels in ACC(Dahua are on to fix this issue) and also be aware of that You need as many ACC license as the recorder have channels. 8 channels=8 licenses.
Best regards
Frank Kristensen
Elcon A/S Denmark