Is suppose it depends on budget and how handy you are. Someone on here recently changed out his entire air suspension set up. Scroll a bit dow the RX section.
The other thing to keep in mind is that this is the internet and while there undoubtedly have been problems with some of the air suspension cars it certainly won't be all of them. You'll have probably noticed that things on internet forums do sometimes get a smidge exaggerated and repeated as gospel...
If I was looking at a well maintained, low mileage, low owner example I'd take a punt. If my budget didn't stretch to that then maybe not.