From what I can gather the ACC's are a little tougher because of the carbon rap, but you can bend them. Thier biggest attribute is that they are very consistant arrows from arrow to arrow. They are even sold in lot numbers I think so if you get new ones you can match the weight closer. I think that is the biggest draw back of cheaper arrows, they have inconsistant spine and weight tolerances. I believe next to perfect form closely matched arrows will get the biggest yeild for being more accurate. I have never been overly concerned with straightness, consistant spine is much more important. I think it is more important than having the proper spine in fact, as far as spot shooting is concerned any way.

If I could afford to shoot any arrows I wanted it would be ACC's or Carbon Express selects. But since I don't have much money I use aluminums because the tolerances are much better for the price compared to carbons. Truth be known I doubt I shoot well enough to tell the difference, its a subconscious type thing I guess. I have shot many different carbon arrows and they all shot pretty well for me.

As far as the helical, man I don't know about that one. You may get them on the arrows alright, but you are going to have to have a drop away rest for sure. I highly doubt that set up would fit thru a prong type rest.

Paul