I love the patterned coat -- classic, but a bit romantic and playful, too. As for warmth, well Indy seems warm in comparison to Chicago! Seriously, though, since we get around almost entirely by car, I find a heavy coat necessary only on the most brutal of days. When it's really cold, I layer one of two ways: a cute fleece moto style jacket under a longer lightweight (packable) EB puffer with drawstring waist and hood. Or: the EB puffer underneath another EB coat: a raincoat with a nylon shell. This last combination is great for being out in wet snow or cold rain. Everyone else in my family has a EB coat "systerm" that can be worn with both fleece (or down) and shell layers, or one layer at a time. They're very sport of course, and I'd love to see a more "fashion" combination. Maybe a lightweight packable down jacket -- to midthigh, layered underneath a boucle cocoon coat?
Love the sound of your coat project, and your new tee is lots of fun --- your own statement tee!