I went from a '12 LS to a '10 2SS... I didn't care about going down in year or up in miles. Not sure how you feel about either of those. I went with the LS originally because my credit wouldn't allow me a new or used SS at the time. I'd say pay your car for a year, throw some extra $$ down if you can each month. By the time one year is up you'll pay a good chunk and get yourself closer to even for a trade as opposed to taking a big hit if you were to trade just a few months after purchase.