Scores on the doors, as promised (there may have been remains of pie mixture on the kitchen scales used for the following figures, but I don't tend to let pie ingredients go to waste so only a few grammes at most)
Cloth Helmet + DC 10/30 = 705g
Large HGU/55P (Kevlar) + Oregon Aero Innards + CEP = 1128g
XLarge HGU/55P (Stock fibreglass) + Gentex Innards = 1371g
Removing the visor from the Kevlar version brings it down to 1001g
Re: ANR - one of our (unfeasibly noisy) Pitts group had factory fitted ANR in an HGU/55P which had marginal effect, and ended up going with the CEP earplug speakers - another member of the group with an Alpha went for a more expensive version with custom moulded earplugs.
Communications & Ear Protection, Inc. - great product and a very sensible price if you order direct from the factory.