All of those will fish, but I'm most partial to the "grey shadow," second row, third column.
At any rate, any time I feel the need to go "buggy" with my dubbing mixes (which is pretty much always

) I've taken to mixing in a bit of the "Canadian Brown Mohair" that Bob Story at Feather-Craft sells--lots of nifty shades in there. I think you will like adding wool/mohair to different substrates, and I think they'll make for a little more durable fly than those that use loosely spun yarn.