I test drove the Model S P85D in 2014, and the front motor whine was a show-stopper for me. I've been accustomed to the silence of the rear-wheel drives. Drove an 85D a year later, and it felt 50% quieter, and more pleasing to the ears. I figured I'd consider an AWD model in the future, when they could eliminate the front motor whine. So, anyone with a Model X have any thoughts? Does it ride in total silence? If there's a noise, how does it compare with a Model S?