My honest opinion about suspension: I only buy cars with the ole' regular set-ups, simply because of costs when repairs are needed. I've always found a pretty susbstantial cost difference to repair a normal setup then a tricky or tweaked one, like air suspension and x-reas. From what I've read on here "which is my only experience with x-reas", it seems like when one item goes bad, it usually requires a few extra connected to it. Air suspension? Forget it, will never have it, costs way too much.
I don't know about lift ability with the x-reas set up, but I believe I do recall reading somewhere on here about it not being the ideal setup to manipulate with lifting, etc...