That "beta" announcement post was back in June. But thank you for your willingness to help. Both Quark Marshmallow ROMs by
@NepoRood are up and running fine, with lots of satisfied users.
See the post about just above yours for most current list of Quark Marshmallow ROMs (post #39). I posted that today because I realized the op had not been updated recently.
I have tested all the roms you posted.
The Nexus Experience is the worst because it is the first compilation or need to make description of the problems since the ROM is in its initial phase.
The Ressurection Remix is a good rom, only noticed a high consumption of battery on my device ... It is fluid but with high consumption of battery and this complicates: /
The unnoficial cyanogen is also good however a few days ago I had a little bug in the status bar when I moved theme he restarted and stayed in bootloop no reason making me give hard reset.
The Mokee is below the Ressurection Remix.
The official Cyanogen is good in most things, but unfortunately use OpenGL 3.1 for me makes no difference (something that the official cyanogen does not).
The AOKP is outdated so do not invest in it very quickly and leaves
Bliss rom is my current and is behaving well, some kernel governors bhb is giving some lags in the status bar off it all quiet ... The battery is lasting a bit much I think can improve.
For me the best is Bliss and Resurrection Remix, I know I can improve this battery consumption .... And this disgrace of 'cell waiting' that could not solve in any way or running kkkkkkkkkkk google 'I hope to help in anything since unfortunately had a XT1225
Google translate.