In MY cae i am just beginner and just received my DM800 ( but mine is DM800HD Se V2) so Openpli won't support according their announcement the don't support V2, other wise Openpli was good option.
I have flashed my Dm800HD Se V2, with Newnigma2 V4.0.8 it come CCCAM preinstalled and option to down load many EMU, i felt it even easier to flash and update using web interface.