For warmth, I've made my own down UQ's and TQ's. Both summer and winter versions. I've camped with my winter quilts down to about 19 degrees. My friend had a NA and since we've camped together on quite a few trips, I've noticed that I need way more insulation than she does. But during the summer, I'm way cooler than she is.
If you're gonna be camping in mostly hot, humid conditions, look more to the Tropical. If you're gonna be in cooler temps mostly (like under 80 degrees I would consider cooler!!) then look at the NA.
I got the optional weathershield mostly for the winter. After I got the hammock and got to using it during the summer/spring/fall, I found that the weathershield was not only good for the winter. It also helps with summer temps that drop at night and I'd get cool (so I'll zip up the shield about half way). And it helps when fog rolls in to keep all that moisture off of me. I was surprised at how often I do use that shield year round. I've even used it on just one side to block out someone else's light from shining in my eyes.