What sort of money are you looking at spending? as I'm in a similar position at the moment. Been looking at the 3 main pickups: Navara, L200 and Hilux
Also been told to consider a second hand Range Rover, dependant on budget either P38 or newer shape if money could stretch that far, although I doubt I could afford new shape. Personally can't stand the Disco 1&2's sloppy ride and a defender is just not practical for motorway driving.
Was warned that the Navara engine is more prone to going wrong as Firestar_3x pointed out further up the thread by both an independant dealer and the farmer's who's land I live on. They all drive either defenders, L200's or Hilux's so I took that to be a pretty good indication.