You talk good.

If ever it happened, where would you place it? Next to/part of the new Visitor Centre? The thing is, a suggestion like that would be an argument in favour of downsizing the monster proposal and having several more modest visitors centres spread around instead (hooray!). The museum could be situated further away, with its own parking, relieving the traffic pressure elsewhere and it could have its own shuttle bus to the stones for those that wanted it.