IMHO stay away from D2, better steel available. what are you going to do with the knife? camp knife/all purpose I would use 80CrV2, a blade this small 0.125" is plenty thick, temper to Rc60-61. skinner/slicer i would use 3/32" O1 at Rc 62-63 with a total edge angle less than 20 degrees.Analysis paralysis! I will probably go with 80CrV2 or a tool steel like O1 or D2.
These two seem to be everyone's favorite.