I have a set of the AirLift air bags on my truck. They appear to be the same as the 5000, but were made before the model designation. I installed them in 2001 without the on board compressor. A few years later I added the compressor and am really happy I did. I wish I had done that originally.
There is more to the issue than just ride height. It is also the ride. With the air springs I can adjust the ride based on changes in road surface, curves, load, or whatever makes me happy.
On my last truck I added Hellwig (metal) overload springs and was only mildly satisfied with them. I had to use a wrench to adjust the ride with them, and the same to loosen them when unloaded (to keep my teeth intact.) Although they worked, they were too much work. A friend of mine used both AirLift and Firestone on different trucks and was satisfied with both. When I bought my air bags one of them had a pin hole in it. With a phone call to AirLift they overnighted a replacement to me. They were excellent to deal with. I have had not problems with them since.
I heartily recommend the AirLift air bags. Next truck I get will probably have another set on it too.
PS- My gage/control works both sides independently, but has two needles, one for each side.