My truck is a base with coils and no Levinson. As I understand it, the air suspension rides nominally better and you have the added function of it being adjustable if you're towing or carrying a lot of gear. That said, the conventional setup is still highly effective and bulletproof... the ride is still excellent, particularly with the right tires.
As for the audio, I know a lot of people swear by the ML system. I've also heard of amps going out (my buddy's LS430 had issues) and head units failing and replacement parts are super spendy. I ALWAYS have music on when I drive and I find the stock system more than capable. It may not be audiophile quality, but it's good and it gets the job done. That said, I came from a Mini Clubman with the utterly atrocious stock audio system, so anything is an improvement.
I spend my days in a 70,000 sq ft wonderland www.hymanltd.com
As for the air suspension, it's especially nice for towing and/or loading up the hatch heavily (e.g. camping trip with kids and dog and gear and toys and.....). I like mine and make use of it often. On my old 4runner I installed Airlift bags for the same reasons, and if I ever install aftermarket suspension on my GX I would keep airbags in the rear in some form.
I also wanted to add that neither the Nav headunits of air suspension have abnormally high failure rates IMO. Yes, there is a potential for the headunits to fail just like any headunit. The kicker is that if it fails, it's potentially not a cheap fix. But I'm honestly not worried about it. Same with the air suspension. Yes, airbags eventually wear out. But it takes ~150k miles and that happens to all air suspension. Again, not something worth worrying about. Enjoy the features if you like them, and budget for potential car repairs just like you would with any upscale out of warranty car.
Last edited by Pnuu; 06-29-2020 at 12:59 PM.
I will say that we love the ML in our GX460. It really has an amazing sound for being a stock system. Heard a few ML systems while shopping for the LS430 and wasn't impressed but once I heard it in the GX460, it was a must have item.