Apologies for bumping this up again. I do so because it really is important even though it is hard to stay engaged in the debate. In some ways this links into my post 'Do museums have a future' - the Wiltshire Museum or the Wiltshire Archaeological and Natural History Society (WANHS) have weighed into the debate with a draft response. They are asking members to read and give their views.
http://www.wiltshiremuseum.org.uk/news/index.php?Action=8&id=191&page=0

Draft Response -
http://www.wiltshiremuseum.org.uk/uploads/library/13/294/WANHS_A303_draft.pdf

I am not currently a member of the WANHS (though may join again) so as such can't comment but the above document is clear and well laid out. Worth reading.