I have the Easton ST-Epics. At first, I thought they were HORRIBLE!!! Notice I said at first. The way they flew made the tails look like green and white salmon moving up stream. My 4 inch pattern at 40 yards ballooned like my waist line! I was PEEVED!!!
Turns out... it was my rest that was the issue the whole time. $140 dollars in shafts and countless years stripped off the end of my life. I can't explain what the issue was, but the end result was that the ST-Epics now fly like my Beman ICS Hunters flew: straight and accurate. Honestly, as I understand it, Easton is making the Beman shafts now anyway. I'd be willing to bet the differences come in name preferences rather than performance.
Yeah I know, your question was about other shafts all together, but I did shoot the Beman's, now I shoot the Eastons.
Plus Firediver is gonna make the next animal promotion before me and I can't have that!!