I thought that I had got to the stage where I didn't want to get oily and frustrated trying to fix cars so I bought a Td4 Freelander which was good and I had no problems with it. Unfortunately, (and fortunately ) more grandkids arrived so I needed the extra capacity that a Disco offered. I have a D2 TD5 and apart from a few glitches I can say that I am glad I made the change. To give an idea of size, I got a 2 seater settee in the back of mine.
If you are handy with a set of tools then you will have no major problems. Download a copy of the rave cd - it is much better that the Haynes book of lies. It also has the added bonus of you can print the relevant sections out and if they get wet, oily, stood on then it isn't the end of the world.
Cheers
John