No respectable forums to my knowledge; however, I do suggest 'Arts & Letters Daily' (http://www.aldaily.com/). I expect you frequent A&L, a bulletin of the day's most prominent cultural articles; on the off-chance there are those still unaware I do, gladly, bring it to your attention.
1. Keen eyed moderators, stamping down on vandalism; including, bad grammar, and bad spelling.
2. A intelligent community of readers dedicated to adding comments of value: carefully constructed, sourced, input.
3. Clean, content-oriented design.
(I might have to put my dailymis.com domain to use)