The X5 is a BMW SUV that comes with a diesel, same with the Audi Q7 and the Audi Q5 I've been running diesel vehicles for about 15 years or so (All VW TDI's).. I have one, my parents do as well, as does my sister. I'm the resident family mechanic, lol! You really can't compare the old diesels with the ones you can buy today, way more power, a lot cleaner, etc. Sure they have their problems (Like all cars do) but for me at least the positives outweigh the negatives. My last TDi had 600,000kms on it before I retired it, my current wagon has close to 400,000kms with no signs of letting up yet.
Keep your eye open for the new GMC Canyon in 2016 with the 2.8 Duramax, should be quite the truck!