LOL at all the "might as well buy a GTR/650i/Cayman/Z06 comments.
You can get a 335i stickered at $61K, and you can a 2013 M3 stickered at $61K. Two different cars, with two levels of equipment.
You load up a Cayman like you'd load up a $65K 435i, and see if that doesn't tip $80K.
2016 M3 - current
2013 ActiveHybrid 3 - sold
2012 M3 coupe - sold