We are debating whether we should buy a used 2017 (90 or 100) or get a new 100. We want a six seater but other than that we are flexible regarding options. We tend to keep our cars for a long time (eight to 10 years), but we typically buy used. We don't want to shell out the extra money for new one unless there is a compelling reason. We'd get the federal tax credit with a new one but aren't eligible for any state credits. Are there any significant upgrades with the current model year that make a new one worth it? Any thoughts would be appreciated!