Most stable Lollipop or MM ROM for 8.4?

I currently have both a Nexus 7 (2013) running official MM and a Nook HD running unofficial CM13. The last stable release for the Nook was CM11 and official CM development has stopped. That hardware is almost past its useful life. The Nexus is fine but I would really like a slightly larger screen and an SD card slot so I am looking at used Tab Pro and Tab S 8.4" models. I'm not a fan of Touchwiz so I want something that I can flash Lollipop or MM onto. I know there's a stable release of 12.1 for the Pro but only nightlies for 13 on either model (and no stable CM at all for the Tab S.) So my question is, are any of the current CM releases (or other ROMs) good enough to be a "daily driver?" My experience on the Nook was that stable releases were indeed pretty stable and nightlies were hit or miss. Can I assume the same for the Galaxy Tabs?

FWIW, I use the tablet mainly for FB, Chrome browsing, reading NYTimes and as a book reader (using the Kindle app or FB Reader.)

Thanks in advance for your opinions.