Many times I see people downvoting questions simply because they have no ability to close a question and the question really belongs on another one of the family of sites. For example, this question on SO. I propose that closing be a two-tiered affair, where a much lower reputation score is required to move the question to one of the other sites than to actually close the question.
The amount of reputation required to move a question to another site should be the same as the amount required to vote a question down. Note that being active on one site (having 100 rep) would automatically give you access to move questions on all sites if your profile is linked. I propose that to eliminate confusion this be a different type of action than close, i.e., a new Migrate "button" would appear when you have 100 rep and the "belongs on..." reasons would be removed from the Close "button".