And to try to answer the OP's question about suspension...there's no basic suspension on the GX470 that is the standard as far as I can tell. In the old days on my 80, the standard was OME and it was easy to get a basic mild build for the 80.
Nowadays, it's more complicated for the GX470. There are several options in the lower end of the price spectrum as well as on the higher end of the price spectrum. Check this thread out:
GX470 Primer for the Ideal Mild-Build for Under $3000
In my garage, I have a coil conversion kit including new OME 60004 rear springs, but I'm actually thinking of selling the new OME 60004 rear springs and getting the Dobinson variable rate rear coils. I'm still running rear air bags, so I have time to think it over. I'm happy with the Bilstein 6112s up front and might get matching rear Bilstein 5160 resi shocks and the Dobinson variable spring rate rear coils.
I ran OME kits w/progressive rear coils on several Land Rovers years back. I thought they preformed pretty good. It wasn't a sophisticated system, well behaved weighted and tolerable unloaded. But as you said, Those setups on the older live axle applications were pretty basic when compared to modern day Coil Overs/Control Arm indy suspensions.
I liked my Icon setup on the FJ Cruiser I owned. But never really carried much weight in the back of that truck.
I've been poking around and finding guys who are having binding problems with Light Racing SPC UCA's when the front is at full droop. YIKES!
I'm narrowing it down to Dobinson or Ironman CO's and shocks then finding the right UCA's and rear spring rate. I am considering long travel for the rear.
Do we all over think this whole suspension thing? Maybe... But get it wrong, you'll find yourself in a truck that doesn't perform reliably and effectively over rough tracks. Not to mention the financial part of it all. I still believe, keep it at no higher than 2" and all is good.
So I'll keep an open mind and looking on Mud for others that feel they have a great setup for their needs and application.
I'll get back to my original reason I started this thread: The tires.
So far and it's only been a week with limited miles. The fit is really good on stock height. Including the spare in it's recess. Traction of the DuraTrac is excellent. The steering is a tad bit "sharp" (I guess that's how I'll describe it) as it is 20mil narrower than OEM and it might catch edges in terrain a little quicker but overall the handling is very acceptable. Definitely doesn't wallow the way the wider, softer road biased tires handled.
I'm satisfied with the E rated choice.
Jeff