I've owned a number of diesel vehicles. I feel that from a practical standpoint, a gasoline powered car is better. Parts are common, service anywhere is a "known factor" and performance/mpg can be matched with careful choices.
If you are looking to save money, I suggest that it's not really possible with today's diesel vehicles.
If you want something unique, the diesel is a great choice. With the possible advantage of a higher resale. (although that was not the case with my TDI Jetta when compared to a prius)
If you need the performance of a turbodiesel, consider how often that performance will be used (high altitude, towing etc).
While modern diesels are great, so are modern direct injection, turbocharged gas engines.