If you were going to "restore" the circle, to be authentic, the stones would have to have the same shallow sockets that is currently thought to have been the cause of their eventual toppling. Deeper sockets would mean substantially shorter stones, a big no-no in our book, and we'd be dead against a stonehenge style concrete job or any other modern engineering trickery.

Then there's the problem of the missing stones, replace with guesstimates? stumpy little "site of" markers?

If you were going to use modern replacements, what about the stumps of the snapped stones? They are original, do you uproot them to put a replica stone there?

Would love to see the original, but prefer what's there now to a botched modern re-imagining.