Hi paul, welcome!
I ran a 2.8td isuzu trooper for 3 yrs and loved it, it never missed a beat and was giving me 32 mpg,but rust and the cost of some jap parts, and the availability issue, made me look for another car. Jap imports are way too expensive and have questionable history, and the u.k. cars can cost even more for all the goodies installed. So logically, the next step was landrover, i'd had a series 3 beast years ago, and that was very agricultural...and not too good for the back, so that was a no no, defenders /90's are superb, but still an expensive car. Then i drove a '94 300tdi disco.......i'm still driving it 12 months later, it's great,comfy, reliable, only problem it had was a leaking waterpump gasket, it had full L R service history@94k miles service parts ..filters disc pads etc are very reasonable and there are that many LR franchises up and down the country you will never be short of bits , and with great web sites like this giving years of knowledge and experience to all, you can't go wrong, so, if you do go for a disco just make sure it's got good service history, looking thro' this forum will give you an idea of varying pros and cons of disco ownership, but that applies to all vehicles, good luck!