Spurstalk is pretty damn active these days (obviously), however the ridiculous use of gifs, profanity, nsfw stuff, etc is major reason why this site is that much better. The biggest reason, though, is that this site is pretty damn well-rounded: the D&D is extremely active, the NBA and Football forums are solid, etc. Oh yea, the hangout is nice too
Orlando Magic have a pretty active forum as well. I grew up a bit of a Magic fan because I have family from there. I used to post on that board before they switched formats and created a new board about a year ago. Dunno if that one is as active as the old one. --Rojogrande