Diesel vs. gas e70

[FSETH]

I figured I would end up purchasing an X5 with a conventional gas engine. However, I am now considering getting a 35d. My knowledge of diesel engines is limited at best, so is there anything I need to be aware of before going the diesel route with regards to reliability or maintenance? Do they require more maintenance? Are there major components associated with diesel engines that make them more expensive to repair or require more frequent repairs? I know finding a gas station with diesel may be harder depending on location, but am I overlooking anything when I am comparing a diesel to a regual gas X5?

Compared to the 30i, the 35d has HUGE torque figures and a much better range per tank, which seems very nice.