PZEV/SULEV - I would never own one, VW or any other brand US or Import.
Here is the deal, PZEV cars have many special parts that sometimes are more expesive than the standard parts and for some brands the volume of PZEV/SULEV cars may be much lower and parts can be rather scarce and hard to find.
Even with the PZEV/SULEV extended warranty on some parts for 15 years/150,000 miles, this coverage is only available by the dealer network and UNFORTUNATELY both the manufactures and the dealers do not fully understand the PZEV/SULEV warranty and there is usually a long delay and big fight trying to get a firm and final answer on what is covered via the PZEV/SULEV warranty.
Case in point, I spent about 3 weeks back and forth with VW Of America trying to get a straight answer on what PZEV/SULEV warranty time, mileage and statewide vs nationwide coverage. I did get an answer, but I do not trust that when the person who answered my question is not working at VW Of America, then do I go through this again and then get a different answer??
Also when you go to sell the car, you may have people that do not want to touch the car if they know what a PZEV/SULEV car is!!
Case in point, some 2003-2004 BMW 3 Series that are SULEV cars have a stainless steel sealed fuel tank with a non serviceable fuel pump. When, not if, the fuel pump fails, you have to replace the entire fuel tank. Cost of tank is over $6000!!!! Yes, four figures. The fuel pump is covered for 15 years/150k miles, but beyond this, you are on your own. Also sometimes the fuel pumps become soft and loose pressure and volume. For $125 most owners just replace the fuel pump, but in this case you have to argue with the dealer that the fuel pump is soft and needs to be replaced.
Each his own, but I have no interest in being green on my wallet and having a car you have a hard time getting parts for and may have resale issues with.
Just a warning.