Uncle J.
These are my choices for those (and one more) winging materials in order of preference:
Snowshoe Hare -best floating hair material there be...
CDC - I like it's ability to trap air bubbles in the barbules and by using the tip below, followed by a dusting with desiccant, I keep 'em floating after sliming. I also use it on many sub-surface patterns:
https://www.youtube.com/watch?v=eOPDH6E1zOY
Elk -Each individual hair holds more air than deer but it gets problematic with small patterns...
Deer - for smaller patterns when Elk just does not work...
PT/TB