I have to agree with Arthur. You CAN find the "perfect" spine for your head/fletching etc with aluminum. I use "the archery porgram" to fine tune my carbons. I find a head/arrow combination that gives me the FOC I'm looking for, and a carbon arrow with the "perfect" spine.
Aluminums, you can use the components then match the shaft, carbons you choose the shaft, and match components...IF your as much of a perfectionist as I am.
I also agree....Timbow2, what videos are you watching showing every carbon arrow break? I haven't seen one yet. Even the cheaper videos done with non-pros...still have yet to see a carbon break on film.
Wanna know which is tougher? bend each 45 degrees and see what happens. Or step on some carbons then aluminums.
In the time I have used carbons (last 5 years) and aluminums (14 years) I am confident that carbons are MUCH tougher arrows.