I have a HGU-55P with a custom kevlar shell, using the standard elastic pull-over visor. I use a leather liner with a thermal foam backing (molds to the head with body heat), and oregon aero earseals on hard earcups. Standard nape strap and edge roll. I don't use ANR, as the helmet is more than quiet enough.
The HGU-55 is designed to be a very lightweight, comfortable headset. I've worn it while maneuvering for extended periods in very hot cockpits, and it's a great set-up. Several liner set-ups are available, from the standard TPL liner to custom fit liners, and the temperfoam liner.