Carbons seem to be more durable as boneaddict said and you can get them for a reasonable price. Few months back I bought a half dozen easton axis arrows from the sportsmen warehouse for forty bucks. As far as tuning your bow and arrows with broadheads I personally try and find the broadhead that doesn't need much tuning. Magnus stingers, montec g5's have flown true for me, not much tuning necessary if any. Also other people think highly of the slick tricks. Aluminum arrows are going to be heavier, but with carbon you will get better speed out of your bow IMO.