What I mean is - the Stonehenge complex is largesly a prograssive development over a considerable time - if (big if) the dating is correct, it was not until pretty late in the Neolithic that Stonehenge got its mega monuments. The original henge at Stonehenge for example was 90m.

The point that I'm trying to make is that (1) we do not know enough about Tara to go around making assumptions about the impact of a massive development that is clearly within the ritual landscape of the Tara complex (for example the road passes between one of the Raths identified by 4W as a possible settlelment site and Tara). (2) Stonehenge is not a cultural icon because we have any certain knowledge of its relative importance compared with other monuments but it is a cultural icon and it is afforded a great deal more protection that Tara, which I would suggest is acheiving a similar iconic state.

Hope that reads ok - I'm not good at constructing long sentences!