20° Incubator is my favorite piece of gear! I originally purchased the 40° Incubator and pushed it down to 30°, but it's not really fun to "push" things out in the middle of nowhere and realize the forecast was off by 10° or more. So I'll keep that for 40+ nights. I plan on taking the 20° UQ down to about 10-15° for a trip this weekend.
I always use down sleeping bags so I cannot comment on the Burrow. However, if I ever get a TQ it will be from Hammock Gear!
These quilts fit great on the Blackbird. I also have the Mamajamba tarp and I love it! It's a real blessing to have detachable doors on trips when its clear, sunny and warm every day.