I guess it all comes down to money and risk.
I like my SE-L and I can tell the air-suspension difference.
Each month - unless I raid it - I save away some cash, for servicing etc.
I also have a Lexus Warranty.
But reading recent posts, there can be other, equally expensive issues. I think it goes with the territory.
The cost of fuel consumption too.
But given all that, I am happy to pay for the comfort, ease of driving, AWD, driving position and very definite feeling of being in a safe car - for me and my family.