I have gone to 4-4" bananna cut feathers. Three will stabilize a field point right nice and it seems to do so for my broadheads, but I prefer the extra for actual hunting. I think you will find they fly well and are much quieter. They also make less noise in the quiver and don't tickle your nose at full draw.
We have had quite an extensive discussion or three about this concept years ago. Maybe do some searches.
Of course, your arrow set up needs to be pretty close to well balanced in the first place.
Some folks (I used to) think that you need as much feather as you can get on the arrow during hunting. That's fine too, but for my shooting, the 4" feathers seem to work fine.
ChuckC