Hi all, I am looking to get a used Model S in the <$50K range. I had been planning on a 2014 85 but see that the 2015 70D's are starting to approach a similar price range. Just curious what owners or those who've had either of these cars in the past think about which way to go. Any major differences other than AP1 in the 2015's? And of course AWD vs. RWD. Thanks for any feedback.