Even if your not worried about fuel costs, I would still heartily recommend a LWB 2.8TD. Indestructable engine, returns about 32-35mpg on average, one of the grunties engines in the range, and loads of room. My personal preference is also the series A. Less to go wrong, and I prefer the lines and edges over the curves of the B series.
Your biggest problem with the two engine choices I have mentioned is he 2.8TD was only in the Series A, and the 3.2 V6 was only in the Series B. So you will have a dilemma over shape and engine choices
