I have been here a few times, but just decided to join and quit lurking.
I have had a Hennessey Expedition model, but I sent that to a missionary in Brazil. I just couldn't get used to the birthing system of egress.
I currently use a lightweight nylon hammock, but have the DD Bivy Hammock on my list. I like the option of ground dwelling when trees are not available, the built-in mosquito netting, and the slot for my pad.
I look forward to seeing the reviews, modifications and pictures of everyone's use of hammocks.