I have had an LR3, 80 Series, a Cheyenne and now GX470. The LR3 I had was in the shop for unexpected repairs more time than I can count. Wheel bearing went out a 15K. Rear end replaced at 65K. Front end replace by 45K. Steering wheel replaced and other interior pieces by 70K. Suspension stuck and wouldn't lift about the same time...other grimlins I can't recall as it has been a few years. Now, I bought the LR3 new and the he LR warranty which was awesome as it didn't cost me a dime and always got another LR for a loaner vehicle. However, I always got an invoice from LR dealer that showed the costs...and the costs were very very high. I had to travel nearly an hour to the LR dealer because, well, hard to find service for them too. At 88K I decided to trade it in because the 100k warranty was running down and, from my experience, I would NOT want an LR without a warranty. Yet, I will admit the coach works on the LR is beautiful compared to the GX.
The 80 was absolutely a dream off road but the on road manners were sluggish in the handling and especially power department AND especially above 6000' feet which is regular travel for me. In comparison, the LR rode the best off road and soaked up terrain with its full air suspension; and it had reasonable on road manners. It was fairly fast too. Had it to 130mph in Montana and felt stable. The Cayenne was fast and handled and stopped, well, like a Porsche... Repairs were astronomically expensive though. Got rid of it at 45,000 mile as I was getting multi-thousand dollar repairs for things that you wouldn't see on a GX for 300K. The tranny went out in the Cayenne at 40K and I got a $7,600 bill as it was just outside of warranty. I had had enough...my 80, with 123k, was just crushed by an ice fall from a roof up here so I traded in the Cayenne on my immaculate GX.
The GX470 is a nice balance. It is not as fast as either the Cayenne or LR and the GX has less gears too 5 vs 6. GX doesn't handle the road like the Cayenne or is not as smooth as the LR on or off road. Yet, it does everything, except rock crawling better than the 80 series. No more pulling over to let others pass on the high elevation passes.
I found and purchase my dealer serviced GX with 100K and didn't blink. Probably one of the few vehicles I would buy with that many miles. Yet, there is a guy up here in Tahoe with a GX470 with 385K with very little service outside of scheduled maintenance. It is said that the 4.7 is bullet proof! It was Toyota's flag ship engine at the time. No real gimlins normally either.
Having had both, I agree, the "GX470 is the new 80" ...there is great review on You Tube by that title. Handles, and accelerates and rides SO much better than the 80. Less costly to repair than the 80 as the 80 is super heavy duty and "over built" and those parts more expensive most of the time than for the GX. For me, the GX has tackled the trails I do nearly as well as the 80. Biggest difference, I can tell, is the less articulation of the axles than the 80 series over deep and rocky trails. Therefore, the GX make a nice dual purpose, daily driver AND off road vehicle...and now that the GXs have been discovered as "the new 80" the prices on the well maintained soccer mom examples have not depreciated on the trajectory they had and for good reason. Maintaining a high mileage one is not that expensive in comparison to other vehicles this robust and capable.
Honestly, for me, I will never have LR or Porsche vehicle again... I suppose if I won the Lottery- having a fully decked out overland expedition LR4 would be cool for just off-roading as they are incredibly capable and smooth, and roomy. But, then again the best set up, for me, would be an 80 with a new Chevy LS V8 conversion if I had the money; and there are shops that are now restoring and re-equip the most venerable 80s still left out there.
My last two cents: If you like to wrench, and have the ability and the pateince to chase down grimlins, live close to a LR dealer or can keep could keep a independent LR mechanic on retainer then get the LR. THEY ARE great rigs when they work and have classic lines and beautiful interiors. However, there is a reason they have such poor resale value.
Lastly, you may want to consider this tale: "that 90% of ALL Land Rovers are still on the road...the other 10% made it home..." Just sayin'...