Biggest myth in Archery pretty much. And one of the reasons you hear about people getting injured with them. They just assume they are ok because they visually look alright. Carbons can and do break down and lose straightness and spine over time. Heck some are not that great right of the box. Truth is aluminums have much better quality control and tolerances for the money. Both are good arrows, but for the money aluminums are better out of the box unless you buy fairly expensive carbons.

Take a dozen 60 dollar carbons and a dozen simular priced aluminums and put them on an arrow spinner and see what happens. I think you will be shocked.

Like the others said, in order to know what arrow you should start with you would need to know the peak draw weight of the bow, how effecient the cam or cams are and your draw length. Also what length arrows you want to use and the point weight.

Some of the online calculators are ok, but not real great since they don't ask for enough information.

If you knew what your actual draw weight was (measured on a pull scale), your AMO draw length (Again, measured the proper way, not what it says on the limb) and the year and model of the bow I could put it in an archery program that selects arrow spine for you. Even better yet would be if you could shoot an arrow thru a chronograph a few times and give me the average speed and weight of the arrow. This lets you know how effecient the bow is and you can calculate things better. Other wise you are just sort of guessing.

Paul