Thanks again guys for the feedback it is helpful. I hope thinking through this here helps others decide. I think all of this speaks to the merits of the platform.
I think the JKU/J30 hits a sweet spot. For those of us who live in and frequently visit urban areas, this rig is parking lot friendly and garage clearance friendly so long as you haven't gone too high with lifting.
My 69 Westy is freaking awesome for providing space in a small footprint. But it is loud, hot in the South (no AC), and slow. Plus, mine is collectible quality and can't really be used as a daily. I can sleep some people in it though.
The Suburban is quiet, modern AC, and easily keeps up with interstate traffic. And while I have slept a few of us in there before, it's a lot of modification to get it done. And you can not stand up in it to change clothes, even if only one person is in there. (And I have a back injury from years back, hence another desire for road comfort). It is also getting long in the tooth, and will need replacing before too long.
I'm not looking to necessarily replace hotel stays, but this could be an option in certain circumstances. But it's not my justification.
I'm just trying to fine tune to lifestyle. Backcountry camping with my son. Big city visits with my wife and daughter. Daily driver for me with a rig that appears to inspire affection judging by the Jeep lovers I know.
And when I say "backcountry", for me that is largely forest service roads. So I'm thinking of what I call "truck, road tires" (not aggressive knobbies) with stock suspension would be enough for my forest service roads while keeping it more quiet on the highway. Then, sound dampening which I did to my 69 Westy. However, while it made a huge difference in road noise, it's still loud in there. So I'm trying to realistically assess how quiet I can get the JKU. I'm not expecting a Lexus, just trying to do my homework.
(I worked for years in engineering and R&D, in case that helps explain some of this over analysis :ylsmoke