All costs/debates aside...
there is something ELSE to consider BEFORE you rush out to get ANY diesel vehicle.
I drive a diesel truck for work. If you have never driven a diesel, you will be in for a shock. ITS HARD TO GET GAS!!!! In my small town, I'd say 1/2 - 2/3rds of the gas stations do NOT sell diesel. of the ones that do (including the Walmart ones) most only have ONE diesel pump. REST ASSURED you will be at the ONLY diesel pump, waiting for your gas, while there will be 3 or four FREE unleaded pumps. You will NOT be able to just pull in and grab the first tank. The diesel tanks are VERY OFTEN in the absolute worse locations (one local gas station pops into my mind... its BEHIND the store in the dark.). Usually the diesel pump is on the end, the other drivers have this uncanny habit of getting angry at you if you block the entrance to get diesel, when they can see an empty pump right beside them. Who cares if your vehicle can't use unleaded??? its a free pump! You should be THERE, not blocking the entrance.
I can't count the number of times I have drove into a station on fumes just to find no diesel pump. i have to pray to the next station! (I'm one of those people who never fills my tank!). I keep it low, because filling my tank is $200.00 and thats a LOT of weight. I just don't see the need in hauling $200 in gas. Not cost effective. Besides, people steal gas. It stays between 1/4 tank and empty at all times.
I'm not saying that you shouldn't get a diesel. I LOVE mine. I'm just saying be aware that pumps are scarce, stations that carry it are few, and it currently costs nearly a buck more per gallon. Gas is faster, easier, more available, and cheaper by the gallon than diesel. Also the diesel pumps are usually further away from the stores, so if you usually go in to the stores, you will walk more. Something to consider if your physically challenged.