The AAL is cheap, easy and works pretty well for a small lift. The long AAL (RE and Rough Country make them) will ride better than the short ones. I have a short AAL and an extra factory main leaf in my rear spring pack now and I think it rides fine. I’d shy away from the ACOS. From what I have seen and heard it is a quality made product, but there is not a whole lot of adjustability. The minimum adjustment is 1.25” of lift, but the max is only 3.5” of lift. That gives you 2.25” of room to play with, which is great for fine-tuning your suspension. If you added a heavy front bumper or winch or your XJ wasn’t even side-to-side this would be just the ticket to level things out. If you are trying to use the ACOS as an actual lift kit I think that you will be disappointed. For a cheap easy lift for the front I think that you would be a lot better off using polly spacers or new springs. If you use the ACOS with the understanding that it is just a temporary fix until you get a “real” lift kit and it will not get you out of buying new springs, it would probably be OK. The way I see it, unless you actually need to compensate for an unlevel vehicle, the ACOS is a $200 solution to a problem that doesn’t exist.