I haven't any experience with Jacks R Better, but I know they have an excellent reputation. I personally am not "into" quilts--I toss and turn too much and can't stand cold drafts down my neck--but this is definitely a YMMV thing!

Enlightened Equipment is another quilt maker with an excellent reputation. ZPacks makes an item that can be either quilt or a hoodless sleeping bag, which has been praised to the skies by some thru-hiking friends. I've also heard good things about Katabatic Gear.
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May your trails be crooked, winding, lonesome, dangerous, leading to the most amazing view--E. Abbey