I think the joke days of LR are over, they seem to have a well engineered sorted product from my observations. When you look at issues with cruisers and the D4D motors in Toyotas and then the joke that has been Nissan and the 3l I think the Disco holds its own, the numbers for comparison are less I would think . Also then compare the fit out they are well ahead of anything the Japanese are offering IMO.
It sounds like you may have made a decision there Jim???????
LR are still odd in the way of British Engineering - some things you still look at a scratch your head 'why did that do it like that????' Especially when they need to take the body off the chassis to replace parts (eg turbo).
I reckon the D5 in 2015 will be interesting to see if rumors hold true. Full alloy chassis (still both ladder and monocoque) which will reduce the weight by 500kg, but no change to the gvm - so over a 1100kg of load in/on the car.