RE: Why Carbon
I started with carbons and switched to aluminums. I think carbons need to come a bit farther in the quality department before I switch back to them. There are some good ones out there, but not at a price I am willing to pay. And the advantages just are not that great to me.
I think you may be off a bit on your speed as well. If you are shooting 270 fps with a 27 inch draw, 50lbs of draw weight and 410 grn arrows that is one fast bow you have. I could be wrong, but that sounds a bit fast to me for that draw weight.
Paul