Another consideration... the double layer 1.1 Blackbird will hold up under your weight easily, and weigh about the same as the Ultralight Backpacker (less if you swap out the suspension to whoopie slings). And the double layer will let you use a pad comfortably, unlike the bottom entry HH.
Also, the first thing anyone who backpacks a lot will do is buy a bigger tarp, after picking up a Hennessy - it looks like a real good deal but unless you are a fair weather camper, the stock HH tarp doesn't give you much room for anything but sleeping. So the fact that a Blackbird does not come with a tarp off the bat is a feature, not a bug - you base tarp selection on your needs. Warbonnet has a nice selection of tarps in several sizes, with optional doors for all.