How many of you have actually used a quilt from Enlightened Equipment?
I've got an EE Rev X 20°. It is a high quality piece of gear tailor made for a single purpose - insulation at a minimum weight. The weight savings of a quilt comes because the quilt doesn't have bottom insulation. It has a closed in footbox to keep your feet warm, but the only bottom insulation you have is from your pad.
In a regular sleeping bag the insulation underneath you is wasted weight because it is compressed and can't trap air which means it isn't doing anything to keep you warm. A quilt is better in this regard and will be lighter than a sleeping bag for the same temp rating. A sleeping bag does a much better job of sealing out drafts however, especially if you toss and turn at night. Also, the quilt doesn't have a hood, meaning you'll have to supply your own head insulation.
I think I am going to try over and under quilts with a hammock this year for a solo shelter.
I've been using hammocks for several years now, and a TQ and UQ is by far the most comfortable way to go.
This photo is of a TTT Switchback hammock, an OES MacCat tarp in snakeskins suspended above the hammock, a Hammock Gear 20 deg Incubator UQ, and Rev X TQ. The weather was beautiful that night so I never unfurled the tarp, preferring to stargaze instead. But if it had rained I could have the tarp deployed in about 45 seconds.
My wife on the same trip, with a WB Blackbird and Mamba Jamba tarp. She wanted the tarp out halfway to block the moonlight.