I went with the JRB Sierra Stealth (40F bag, sewn in foot box, 900FP, 52in wide for side/ground sleepers):
Mine weighs 14.67 oz as shipped from JRB.
It has a "non-snagging Velcro re-sealable head hole." This is a resealable slit in the middle of the quilt that allows me to wear the quilt around camp as my insulating layer, thus eliminating a 10oz down sweater from my pack. That's a big weight savings! (I stuff it all under a DriDucks rain jacket if wet)
Sure you look a little stupid, but I'm not on the trail for looks. When wearing the quilt as a serape I am extremely warm, it's thicker than any down sweater I own for sure. I would only wear it while hiking in the first part of the morning. After I get heated up, I generally am looking to shed layers, not add them. :p
Also the outer shell looks to be a bit beefier than competitors from what I can tell/feel.
The quilt will get lighter for me shortly as well... I'll be swapping out the nylon strings used to cinch the neck area closed shut for lighter stuff, cutting off the HUGE tags JRB attaches to the quilt, and removing one lineloc that I don't need.
I also liked the JRB offerings because they have some products that mate with the wearable quilts to extend your warmth:
Down sleeves (5oz):
I will use these to cover my arms when wearing the quilt and it gets a bit colder, and then put them over my feet (my feet always get cold) as down booties w/out carrying the weight of booties or thicker socks.
A down vest like the WM Flash Vest could be added to mix and match with the down sleeves (moderate warmth in the Spring/Fall while awake) as well as wearable quilt plus down sleeves (lots o warmth while awake). And of course a vest can be warn to bed to up the warmth of your sleep system too.
Down hood (2oz):
I like quilts because they allow you to bring a separate hat to keep you warm at night or while awake (multi-use item). You can bring whichever hat you need for the temps. The Down hood would be used to get the most warmth out of your quilt. I like it because the down hood stays with my head, even if I am rotating this way and that way within the quilt. I used to hate sleeping on my side in a mummy and ending up waking up because I wasn't getting enough air, breathing into the side of the bag.
For keeping drafts out, I had the same question and got some great answers/ideas:
I would not advocate attaching the quilt to the pad, but I'm going to use a thin shock cord and cord lock to cinch up the back of the quilt to seal out drafts like Greg Mihalik states when it gets cold enough to matter. It will still allow me to roll around, but hopefully seal out most drafts.
GL in your choice!