Yep, I'm looking for the same thing - a breathable warm winter riding jacket... tired of freezing on my bike. A friend of mine suggested the Shebeest jacket that is on sale right now on the team estrogen site - it's the black/bluegrey one marked down from $130 to $80. She says it's great and kept her warm all last winter.
If you find one that is not dark, so that a rider can be seen easier, please let me know.