I went to the Aston Dealer today, DB7 not my cup of tea too much like the XKR jaguar, for more money. I see that the 355 and 360 service is pretty expensive because the engine needs to be removed for most things. Do the V 12 cars have the same service costs as the 355 or 360 since its a longt placed V12 i would think service should be a bit less in a 550 or a 456 GT. I am leaning that way more . What is the difference between the 456 and 456M model and can a 456M be found with a manual gear box. I read somthing about window seals on the early 456 cars can someone elaborate plz.