Science fan
Member
I would go for the new 75D. It will be your new car from the get-go. You would have benefit of all the experience that Tesla has had over the intervening years, the many improvements to reliability, better electronics (much faster computer, enhanced autopilot with better computer and sensors), tax rebate, better trade-in value, refreshed look, and a car that is easily fast enough to meet any driving need. Not even a close choice, in my opinion.