In response to the main question of this thread, I think this website ranks higher than Sherdog, MMAWeekly, and UFCJunkie. The news is easier to sort through, and the forums are swamped with "Sherdog-type" trolls.
The mods do a great job of keeping things under control, and of course, the fantasy picks and wagering games are first class.
Thank you MMAPlayground.com!!!