I have been thinking lately about getting my first Ferrari. The 328 seems like a good starter car, but I am sold on the 355 F1 Spider. I have seen a few Euro spec cars out there and they seem to be about $15-20K less than a U.S. spec with similar mileage and vintage. Is there any reason not to buy a Euro spec car if the car has been converted to U.S. specs and is street legal in California? Are there problems with emissions due to the conversion or what is the reason for the discount on the Euro cars?