>>I still might end up with a TDI (e.g. maybe Jetta TDI wagon), but I'd have to think about it because most gas stations don't have diesel.
Huh? Where do you live?
Around here, and over in the FW/Dallas Metromess, it's unusual to find a gas station that doesn't have diesel, although not like in Europe -- it's not part of the farm of pumps in the main line. Generally a separate pump, often off to the side, where you kin git a hoss trailer in an' out reel easy. Also true all over the West. I suppose it's rarer in raised-pinkie land, but even there the truck stop can't be all that far away; the guys who bring you your brie have to fill up somewhere :-)
Diesel pickups are all the rage -- Dodge/Cummins did some real good marketing there. My neighbor has a Ford dualie, rattle rattle rattle.