I agree 100% with your thoughts on Lexus. If they even remotely made the GX more offroad focus or even designed it better than the soccer mom look, I would totally go that direction. My wife has an RX and the dealer bends of backwards to take care of everything. That said, I've been lucky to have a good experience with my local LR dealer but I think that's because I'm part of the local LR club that they support and got to know the GM and a specific service guy really well. They do take care of me in reason but it's definitely still not to the considerate levels that Lexus was willing to go(pick up and drop off my wife's car to her).
I have an extended warranty on my LR4 but when that runs out in 2016, I'll be trading it in for something else. Maybe a new Disco or Defender. I'll take a look at the GX at that time too because the quality and reliability is hard to pass up.
I had 3 RX350s. (We had become empty-nesters so I had downsized from a Land Cruiser and we weren't interested in going off road.) I see two things going for Lexus. First, they change their vehicles very slowly and very carefully. Great for reliability. Not so good if you want to be on the leading edge of cool stuff. As I researched the LR4 I tried to convince myself to go with a Lexus multiple times. But the RX is not what we needed (though better off pavement then my current MDX) and every time I sat in it it was just so much the same. So little change. The GX has the 4' barn door and less interior space than an LR4. The LX, well to me it just felt bloated. And then there is the lame arrangement of the 2nd and 3rd row if you are interested in using that as a cargo area - which I am. I will probably drive most of the time with my 2nd row flat and one or both of the 3rd row seats flat. But back to the topic - by minimizing the change to the vehicles they also minimize the reliability risk.
And then there is the way they set up their dealerships to truly appeal to the luxury car buyer. The primary Lexus dealer in my area just opened a new two-story dealership. It is gorgeous. I don't know what they spent on it but the half of the 2nd floor facing the mountains is a cafe which services coffee, lattes, lunch, etc. There is a waterfall/feature. Massage chairs. All upscale furniture. And of course good wifi-enabled work areas for people like me. Every sales person is dressed in a suit. No pressure sale. Very nice experience.
I go to the Acura dealer and they are all nice people but it is no where near that level of luxury feel. It is closer to a Honda or American dealership. Even the local Mercedes and BMW dealerships do not have the same feel as the Lexus.
People feel pampered when they go into that Lexus dealership. And I believe, along with reliability born of slow, careful change and a willingness to fix whatever is wrong the feel you get in the dealership matters.
Lexus, at least the one here in Denver, nails it.
That said, the feeling and enjoyment that is most important to me is driving the vehicle and experiencing adventures in it. For me, I believe the LR4 will provide me with far more of that than any of the Lexus options.
Sheez, am I long-winded this morning or what?