RE: Aluminum or carbon?
As far as carbon's, I don't like them and also don't know nothing about them so I can't help you there. As far as Aluminum's I've shot them all my life. Being your pulling 55lbs I would possibly give 2117's a try and see how they fly. I like heavier set ups though. You could also go lighter If you wanted- 1916's, 2016's.