I tend to prefer Wikipedia for movies. The exception is actor headshots if I'm trying to identify someone, which Wikipedia lacks for licensing reasons, but otherwise Wikipedia tends to be better than IMDB for most needs. Wikipedia has an IMDB link on every article anyway.

Another need I guess might be reviews, for which RT or MC are better than IMDB: not sure if either of those two will fare better than IMDB in this search engine but again Wiki has links out (in addition to good reception summaries)