I would also rather like see DC-8 and Classic 747 made by CS. I think CS is best at making these old jetliners, although CS 757, 767 and 777 are very impressive addons I still haven't found them to be as good as CS 707 and 727 which I also own, personally for 767 and 757 I have found some of its competition to overall feel better to me (not in area of eye candy though), but nothing beats CS 707 and 727, and probably 737 too although I don't own it.

I personally like Airbus planes and think that their flight envelope protection overall makes them better in certain situations than their competition is, but modeling Airbus flight envelope protection and all that is really complicated process I have heard, so I think it wouldn't be worth it as another company is already working on very high quality small Airbus series and will likely model also bigger Airbus airplanes after that.