I hunted with aluminum shafts for many, many years until the newer carbon arrows came out. Once you start using carbon shafts it's really hard to go back to aluminum..... With carbon they are either dead straight, or broken.... Nothing in between.
I'll never forget a elk hunt i was on where i took a fall going down into a deep canyon and bent every arrow in my quiver. Unfortunately i didn't notice that i had bent them until i came up on the elk herd in the bottom.... One at a time i pulled out arrows only to drop them on the ground until i realized they were all bent way beyond salvage. Its a pretty helpless feeling watching elk feeding 40 yards, away and having 6 bent arrows at your feet.
After that little episode i went with carbon and haven't looked back. Carbon shafts also recover from paradox much quicker than aluminum does....
I'd highly recommend a CE Heritage 150 shaft for your 45# bow as the toughest of the bunch, or the GT 3555 for an economical shaft..... Another good shaft that are reasonably priced is Bemans Hunter series. I think the 500 would be great for 45 #. I've used those shafts a lot for 3D and they hold up to abuse pretty darn good...