I will give you my opinions, and they are only opinions. I personally feel after using both kinds aluminums are better arrows for the money as far as consistancy and quality control goes. Carbons are tougher and can be had in lighter weights though. Now a days you can also get fairly heavy arrows in carbons if you want them.

I will give you another opinion, don't worry about your KE or how fast your bow shoots. It won't make you shoot better. If you have a modern compound drawing more than 25 inches and 40 lbs of draw weight you have enough to kill deer at normal bowhunting ranges.

Most often you will hear 400 grn as a minimum for hunting arrow weight. I would tend to agree with this. However if you have a bow that produces quite a bit of energy it really doesn't matter much. Chances are though if you have a bow developing that kind of energy your arrows will weigh 400 grns in order to get them to spine right. Not always though.

Heavier arrows are generally more quiet and better for your bow as well. I have a 26 inch draw with about 55 lbs of draw weight with a bowtech mighty might. I shoot 450 grn aluminum arrows. It isn't very fast, but it's VERY quiet and shock free.

Paul