Land Rover tends to have a history in connection with great expeditions. Need I say any more about Camel Trophy and the G4? These days they're still trying to get their vehicles out there being used for what they were designed to do, by putting on no expense spared romps in the desert. They look great fun and the videos are fantastic. Oman looks a great place to go and I can say that Morocco has a whole lot of adventure waiting to be tapped into.
Whilst the promotional stuff tends to be centred around Range Rovers and Discoveries, they always seem to take at least one Defender along. (Presumably in case one of them gets stuck....?)
Expedition to Morocco
This video is astonishing. I recommend you watch it in HD.