I have a pair of the 16s (non-HDX) and they work very well. Would highly recommend but lean towards the 16s instead of the 20s because of the limited FOV.
A hunting buddy loves the image stabilized SIG binos, with 16X being his favorite. As others have recommended, the lower the power, the better your FOV will be.
I am torn between 16 and the 20, I do know that the 20's will be able to see farther and pick up animals better but with a cost. My question is, is the cost worth it? anyone use the 16 and the 20 hunting last year?