i think any full plumed drake is worthy of mounting, especially if it is special to you. greenwings are gorgeous too. i just dropped off a rather large wood duck drake with perfect plumage at the taxidermist. im having it mounted standing with its wing slightly raised and in a glass case. wood ducks look better standing than flying IMO.

on a greenwing id go with flying pose on a piece of driftwood. just my 2 cents.