Well, despite being unable to load some of the pagelinks you guys have given, I'm pretty convinced I should stick with me lid.
And for those who have read the G-PLMA incident I wear my UK Mk 4a which has a good foot of downlead from the helmet and I use an 18" coiled extension, so I hope there's little chance of such an occurence happening to me.
I have to admit my original question was more our of curiousity than much else, but having read the response I really am glad I wear one.