Calvin's a fine place. One vague similarity between Wheaton and Calvin is that they're both located in paraministry meccas. (How's THAT for mixing both metaphors and maybe even Gods!
) Both have ample opportunities for exposure to worldwide works via local presence. They're not so similar in student make-up. Wheaton is a very national/international place while Calvin is a much more denominational/regional place.
Both provide fine academic experiences with minimal post-modern influences, but Wheaton has a much different profile, for what that's worth. Says zilch about the actual undergraduate experience one may have either place. While a totally different type environment, Taylor is also a place in that general neck you may want to look at.