Currently I'm using XX78 2315 shafts with 4" quickspins and 125gr Magnus Stingers. I've finally got my bow tuned where I want it and everything is shooting well for me. (560gr, 225 fps)
Be that as it may, I'm still tinkering with 5" Killer Vanes with as much rt. helical as my jig will allow. I'm also messing with 5" feathers and 100 gr. heads.
I just bought some Blazers today and will give them a try too.

So far I am getting my best, most consistant accuracy with the Quickspins. I don't see how the 2" Blazers fletched with a straight offset will give me the stability I need but enough people have told me that they work that I figured I'd give them a try. Those Quickspins sure work great but they are too damn expensive and they wrinkle quick.