My company is relocating me to Chicago, IL in the next few months and this move is an excellent excuse to push the wife to let me buy the Tesla. However not being from the area and not really having survived a winter yet I wanted people's opinion on AWD or not. Those of you who have RWD, have you found the car to be heavy enough to not be effected by the ice and snow? I am coming from Philadelphia so I am not stranger to black ice and snow. So the draw of AWD is appealing, however I was looking into a Tesla long before the 'D' line came out and the reviews and opinions seemed pretty high. While I can afford the 70D, a used 85 or 2013 P85 would certainly be welcome for a similar price point if I don't really need the AWD. Thoughts?