Do you have a preference for how the fabric feels? What do you currently use for a SL hammock, and how do you feel about it? Order some samples, our opinions on some of these things are worth what you paid for them.

Kitsapcowboy's conclusions are certainly correct for him, and he makes some good points about firmness. Subjective stuff is really for you to figure out; I disagree that Hexon has superior feel for instance, but I know that we've both made hammocks with all of these fabrics and know what we like and why.

In my experience, stretchier hammocks are better for side sleeping. Firmer is better for back sleeping. I find stretchier hammocks are a little better with regards to shoulder comfort, but I rely on my ridgeline length to address that along with any calf ridge.

As a starting point to select something based on your sleeping style and preferences, I believe the objective consensus you'll find is that:

Firm to Stretchy: Hexon 1.6, HyperD 1.6, Robic 1.2, Robic 1.0, Hexon 1.0, HyperD 1.0.

Feel (Smooth/Satin to Textured): HyperD, Robic, Hexon. (This is an odd one, the Robic base fabric is smooth but you can feel the thicker ripstop yarn, it's more noticeable in the 1.2 vs. the 1.0 so at first it's more textured than Hexon, but it smooths out a bit over time and now both my Robic 1.0 and 1.2 hammocks feel smoother than their Hexon couterparts).

Ease of sewing: Hexon & Robic are both easier than HyperD. Heavier is easier than lighter. None are difficult.

I weight 200 lbs and for SL hammocks prefer HyperD 1.6 and Robic 1.2. My brother weighs 35 lbs less than me and yet chose Hexon 1.6 for his hammock because he's a dedicated back sleeper, again highlighting that everyone is different.

You may want to order multiple fabrics, make some sheet bend hammocks when they arrive, and sell the one you like the least. I'm sure you'll find a taker for 4yds of as-new fabric at a slight discount.

On netting, the 2nd gen 0.5oz netting is way better than the 1st gen in terms of workability and durability, but I agree with Tarheel that it's still lacking as a long-term alternative to 0.67 (which still needs to be treated carefully).