I share Mike M's preference for hooded down jackets. I have found that adding a hood to a down jacket (or any other jacket for that matter) seems to increase the overall warmth of the jacket in a nonlinear way.
That is to say, a jacket feels A LOT warmer to me when a hood is added– more so than you might otherwise think. I don't know exactly what it is, but the whole jacket seems to trap heat much better and funnel it to your head when your hood is up.
In a lightweight down jacket you pay about a 1 ounce penalty for the hood, and to me this is an ounce very well spent. But of course, YMMV.

