Spinnaker do you not like using your trunk bag? What about a small pannier for regular rides?
I am thinking of a bag on top of the front rack. I have this bag:
MEC Rack/backpack bag
and normally put it on the rear rack but am thinking (another one/) on the front would give me just that teensy bit more storage without resorting to a pannier. I need to get an appropriate front rack to enable this.
I don't have a handlebar bag, as I have been quite happy with the above bag (it converts to a knapsack, too -- way cool!). I think it has a larger capacity than a regular handlebar bag. The more I read about weight distribution and height, the more I feel inclined to keep the weight on the front as low as possible and avoid getting a handlebar bag altogether.
The downside is the bag isn't waterproof.