I bought this jacket a month ago from TE:
http://www.teamestrogen.com/products.asp?pID=16089

It has all the features you are describing as looking for.
It's soft and stretchy, drizzle raindrops bead up on it (not waterproof in heavy rain though), wind resistant, big back pocket, reflective piping, formfitting, breathable, comfortable, nice and warm but not suffocating. I'd say it packs/rolls pretty small but not tiny like a light windbreaker might.
It looks FABULOUS and sleek and is so comfortable. I love mine and wear it all the time. I like that it's soft and stretchy, so it can fit over varying thicknesses of base layers. Always looks great and doesn't wrinkle.
The medium fits me sleekly without any bagginess -I'm 5'5" 140 lbs and pear shaped.