I have only shot the rear tapered POC shafts, but im doubtful taper types will matter much as far as fletching goes. I have shot 5.5", 5", and 4" fletching both banana, and shield cut. Unsure of hieght, but was cut with a lil chopper. They all work great, but I personally like the 4" anymore, and believe there is slightly less crosswind effects with using them. I also tune my arrows perfectly as possible though. As far as noise, i think the difference is not perceivable, if any,between all of them. I think many folks like 5"+ though, for the bit more of stabilizing properties. I will say my arrows are extremely quiet.