This is only my second season hanging, but for what it's worth I have a JRB Nest, and I just ordered a Potomac from blackbishop351. I also have a super shelter.
I love the JRB nest, but am planning on using the potomac for a UQ, and the nest as an OQ. I was trying to decide if I should get another JRB, or not. For my second quilt, for me, the Potomac made the most sense.
The nest makes a great OQ and the foot sack thing is great. It can also be worn as a parka.