It looks like you had LR4s in the past so you know what you are missing. As long as the body is solid I would probably just keep the 08. The mileage isn't very high.
No LR4 is going to be "modern". The last one rolled off the line 5 years ago.
Lost the ‘13 LR4 w/ HD pack to my ex in our divorce. I loved that truck. Picked up the ‘08 LR3 shortly after. Body as well as the paint are still in fantastic condition. Put 50K miles on it, its really been trouble free and reliable.
I noticed the 4.4L is quieter than than the 5.0 which has me wondering if the SCV6 is smoother than the 5.0. Also the other gentleman pointed out the “tightness” of the ‘16 vs ‘12. Perhaps its the age of my ‘08 plus its been years since driving the 5.0 but the LR3 does feel “looser” like it has more body roll, sways or tilts more in turns whereas my memory of the LR4 turned flatter, more stable at highway speeds. That why I was questioning the suspension or perhaps its bushings.