My daily driver is a 2007 Range Rover HSE Supercharged. Up until three weeks ago I would have told anyone it is by far the best four-seater I've ever owned - rock solid, fast, quiet, and fun off-road when I'm up in the Hill Country. Then..... I took it in for its 37,500 mile service on April 12th and mentioned a couple of irritations I had with it (a growly rear and squeaky belt). Its been there ever since, getting; new radiator, new power steering pump, new rear differential. Still waiting on parts. Still, I can't think of any other vehicle that could actually do all the things it can, so it would be a difficult call to switch to something else.
You can still buy new Def 90s in UK - they're pretty cheap. You can also buy an effectively brand new one built on an older chassis - this saves a ton of tax, plus I imagine you could easily import to the US (pre 67s don't have to meet any safety or emissions rules?)