I wish there was something like it just for Calendaring though. Especially on the desktop. For email I'm already using Polymail full time and it's a hassle to have two email clients just for calendar.
This was decision as well. In the price range of the Model S I was considering the M6 and the 911. Ultimately I went with the M6.
GT characteristics when I want, goes plenty fast for someone that seldomly goes to the track and yet still is capable of exciting on the road. The P85D, while fast, when I floored it I felt like I was taking off on a plane but there was a sense of comfort and safety that, funnily enough, I didn't want.