haha, rovers in the shop; that never happens.
You sound like you are exactly where I was about 1.5 years ago. Ill tell you whats up; ive had my disco II (01') since then and it hasnt been in the shop for anything longer then one overnight (for recall-warrentee covered work). I have been what you could call "over-maintaining" my rover, the first thing I did when I bought it with 45K on the clock I changed everything that you normally would change (ie. oil filter/oil, air filter, etc. etc.) and replaced it with high preformance K&N everything filters, and Castrol Syntec oil, and more sythetics in everything else. Then I brought it to be totally inspected and serviced by my local rover (for free, 45k service). I have been changing oil every 3k miles give/take, im not taking any risks.
That said, I have never been in the shop (except for the recall service) for anything other then regular service intervals. Nothing has gone wrong on my rover excep a couple bulbs that burned out and I replaced them under warrentee (w/o would be like $6.00 for two bulbs). I also seem to be replacing the regulars with preformance parts faster then they can break down.
I dont know much about the rangies; but I must tell you that I have heard of some nasty things with other Disco II's, and even worse with the Lucas-wired Disco I's; but there are even more people (here at least) that love thier rovers and know how to fix them when they are down.
Im not sure if the RR parts are even more, but I can say that the stock parts from the dealer are crazy $$$. Also thier service is very pricy; wanted $1100 to wire up 4 hellas to the roof and two to the front; err..minus the rack and hellas (decided to do it myself now, and learn a thing or two; or three). If something breaks the good news is that you can probably replace it with a preformance version thats nearly the same cost as the stock part. Also a tip; if you plan to wheel it, prepare to bash out the lower hella fog lamps, that was my LR initiation, then I recently cut them off for more ground clearance.
If you really want a rover think it over (hehe, rhymes; I hope jeepers dont read that). Just have to weigh the pros/cons. If you getting it for the heritage, style and off-roading, then perhaps yes, but if its all for showing off, then maybe something else would be better.
I would definatly consider an extended warrentee.
Also, if you want to off-road you could also look at D1's, only cost like <$5k. (if you dont spend the other $15k on repairs

)
Just like those mastercard commercials;
Im Josh Shapiro; Im 16 years old; and this is my Rover:
If you really want one and you think that it will be ok