Looking for a big cozy sweater that can act as a jacket for the winter. Weather here gets in the 40s or 50s at the lowest. I don't want to buy a maternity coat. Something that hangs low and will cover my butt if I wear leggings. I found this one from Gap, but any other suggestions?

http://www.gap.com/browse/product.do?pid=846405012&vid=1&locale=en_US&kwid=1&sem=false&sdkw=wool-hoodie-cardigan-P846405&sdReferer=http%3A%2F%2Fwww.gap.com%2Fproducts%2Fcardigans-for-women.jsp