What does cut it, and is equally as comfy as an old sweatshirt, is a pretty pullover. A striped cashmere sweatshirt from J. Crew, adorned pullovers from Forever 21, Sweet Rain's studded sweatshirt from eLUXE, and then there's the fashion blogger fav, Zoe Karssen's Créme de la Creme pullover (which is no longer available, but still a fun choice).
You know what I'd really love to get my hands on? A perfectly classic (and dare I say vintage?) Club Monaco Crest Sweatshirt. I had one in hunter green and one in burgundy in grade school, amazing how on trend I would have been with both colours this past fall.