(35 years experience here, land and sea, 10 years hammock camping)

You said "backpacking" (which in our context, suggests both hiking and camping), so I'll have to infer you meant you wanted a hammock suitable for camping in, as opposed to camping in a tent AND lounging in the hammock. 

I have a multi-purpose "gathered-end" hammock (hammock-tarp-poncho, I think it's made by American Inovations, one of the MANY recommendations I would make to REI Buyers!) which I've made a few mod's to and I string it up in a way that not only gives me protection from sun, wind, rain, cold, and falling debris from birds and squirrels, but with my setup, I can lay essentially "flat", side-sleep, even lay on my stomach if I want (yes, laying slightly on a diagonal does yield a slightly 'flatter' feel). But then I specifically bought my hammock for camping, not lounging. 

As to your "Comfort", this is something you're just going to have to find out for yourself. I hate to state the obvious, but do your research, read the personal reviews (by people who have ACTUAL, first-hand EXPERIENCE using the product for a reasonable length of time), buy what you're interested in, try it, if you don't like it, REI has a VERY liberal "no explanation required" return policy. 

There are a lot of good products out there, HOWEVER, no one product is meant to satisfy EVERY person! The key question you need to ask yourself is, exactly WHAT do you demand from your gear?  I am a wilderness hiker, I often go deep into the backcountry for weeks, even a month or more, SOLO! So, I demand dependability above all else!! Distance hikers are weight weenies... sorry, I meant "often obsessed with base weight"... so, they tend to lean toward "ultralight" gear. Fair enough, they're usually not more than a day from the next town and their hotel. 

As to "weight", sure I'm weight conscious, no matter what kind of hiker you are, ALL hikers are weight conscious. I've tried ultralight tents and hammocks, but I also returned them to REI because they failed! (tore). To be fair, this is not a reflection on REI's buyers or the product makers or the design of the products. My standards are just higher because I'm almost always solo in the wilderness and, for safety's sake, I can't have any gear that fails!!!  

For me, it's not about the money, or having this season's latest-and-greatest. I'll happily pay top-dollar for gear that meets my needs. As I like to say, I don't mind spending money, but I DO mind WASTING money! A "bargain" that fails in a bad situation is NOT a bargain. 

So, to be of any REAL help, you need to tell me/us what kind of hiker you are and what your priorities are.