After fletching up some 3 x 4″ w/out wraps, here are all the weight/calcs (all with a 300 gr. head):
Bareshaft: 26.3% FOC
4 x 2-1/4″ fletch: 25.4% FOC
3 x 4″ w/out wraps: 24.7% FOC
3 x 4″ with wraps: 23.6% FOC
So the difference between option 2 & 3 is barely more than 1/2 of 1%. And as a side note, the 4″ feathers add 12gr. of weight to a bareshaft.
Frankly, I’m not too concerned about a a difference of a mere 1/2 of 1% so I think it really comes down to which is most stable in flight with a large broadhead. Which means it’s time to fling some arrows!