Air lift is by far the gold standard, they come up used for sale almost every other day on the "widebody 86's" fb page. i leave it up to you whether you want to buy new or used. air lift is known for religiously having 25% off black Friday sales. that fb page has about 1000x more activity than the forum for widebody related discussion, i recommend uploading some pics there and asking questions there.
Air lift is by FAR the go-to air suspension setup, to answer your question though