My father had a 1997 2.5 DSE auto which was only a few months old when he bought it. In standard form it was quite thirsty (24-35 solo) and was pretty gutless. The LR dealer fitted a tuning box to it which transformed the car in every way - more economical, a lot more responsive, and held gears much better. Sadly, although everyone banged on about BMW's reliability and build, he had all kinds of failures - engine fan viscous coupling, both rear suspension air bags, corroded oil cooler union allowing fluid to leak all over, an exhaust system which fell to pieces (literally) after three years. He hung on to it until 2002. He still says that had it been more reliable he'd possibly still have it now.
The air suspension is brilliant for towing (I have it on my current car), although the Range Rover you're looking at is a bit "old school" in the way that it drives - rather wallowy, vague steering etc. However, if you get a good one I'm sure you'll be pleased. The 4.0 litre V8 with an LPG conversion is supposed to be the best of the bunch