I don't think it's worth buying the used one, honestly. I paid under 15k OTD for my Touring, and if you're financing the $2k difference is almost negligible in your monthly payments. A modified car that was traded in that quickly tends not to have been treated very well and will probably be nothing but trouble. You also get your choice of color, don't have to fix the messed up parts, get a full new car warranty, and get USB iPod/etc connectivity if you just buy a new '13.
Good points. Still looking at new. The one part of the 2 selling so slowly that I like is that some dealers still have some brand new 2012s left at low prices as the 2013s roll in. Gotta work it.