I'm ready to make the jump from bag to quilt, I think, having been previously been uncomfortable with the idea. I'm thinking either the Nunatak Ghost or Specialist. The latter is a little larger for a 1 oz penalty (width 55",45",38" vs 46",43",34"), but I can only guess whether that's something I need. Is it my latent fear of being cold in a quilt that makes me mistrust the Ghost?
I'm 6'0" (I'll be getting a custom size between M and L) and medium build. A sort of cold sleeper. Mostly side sleeper at home, mostly back when camping.
I'm interested in answers for bivy, tent and hammock to the extent they might be different. I definitely want it to work in a hammock.

