As mentioned earlier I prefer feathers.  I also like to fletch 4 instead of 3.  I would think that with the introduction of drop away rests 4 fletching would become more popular.  Sure it might be more than what is needed but in most cases more is better.  I’m going to try the Gateway Razyr feathers.  They are basically Blazers or Quickspins except of course they are feathers.  There is the issue of rain making feathers lay down.  I waterproof mine with a powder made by bohning.  This stuff works.  I spent a week in Illinois and it rained everyday all day.  My feathers stood up and never looked like rain had ever touched them.  It doesn’t add any weight or effect accuracy.