Wood arrows are nice, but can be costly to buy ready to shoot. Any of the sponsors here that sell them will help you decide what spine etc. Aluminums are good, and easy to tune because they come in so many different spines. They are not as durable as carbons, and will bend or crease if you hit one with another arrow or such.
I like carbons. They are easy to tune since it's easy to add weight up front. They come very straight in my experience if you get good ones, and are very durable, especially if footed with a short section of aluminum from an arrow. They are expensive, but I feel that they pay for themselves by lasting a long time if you don't lose them.
Someone more knowledgeable than me will have to help you choosing the correct spine. I shoot mostly Carbon Express 4560's. All the bows I shoot are around 50-53 lbs. and I can use them with all my bows cut to same length by just changing the weight up front.
Once you decide what material shaft you want the guys can advise on correct spine, or the dealer can help you.