The GT2 has the drive by wire shifter that does not have a manual shift mode. All the other models have the "mechanical" shifter that does give you the ability to put it into manual mode, and keep it there until you put it back into auto mode (unlike the paddle shifters which revert back to auto mode). Which do you think is "better"? Pros and cons of each? To you, was/is the drive by wire shifter a deal breaker because it doesn't have a manual shift mode? I'm leaning towards the GT1 for this reason.