Hi all, my first post here! I am working on nailing down a Model S purchase, and I am primarily looking for a CPO P85, but since I would like Autopilot, it's more likely a P85D. In the showroom, the sales person recommended that I consider a 90D because the price is going to be similar or better after the federal tax credit, and I could take advantage of an owner referral as well. And honestly I don't want the 21" tires if I can avoid them (which I could if building new and not getting a P). I believe him that the 0-60 on a P85 and a 90D are the same, but is the overall drive the same? He did not have a 90D for me to drive, and I know from the website that the P models have the higher power rear motor, and the 90D has two smaller motors. I'm going to try and get into one for a test drive, but in the mean time, I thought it was a good opportunity to join the forum and get my first post in! I can't wait to keep reading!