Thanks everyone for the help,but is there anybody who can speak to a difference between the GTSB Pro and Ultralight? After reading the rest of these replies along with other threads on this forum, it seems like the general consensus is that the ENO Doublenest is notably more comfortable but it's hard to tell if that's compared to the ultralight or the pro (with a few exceptions).
Also, I'm about 5'11" 190lb since that seems to be an important factor when talking about comfort.