You can go to any arrow manufacturer's web site and most have a chart that you can look at and pick an arrow from with just a few known factor's. Check out www.goldtip.com and look up their chart, it shows your set up to need a .600 spine. The arrows will shootas good as you can shoot as long as your bow is tuned properly.

Edit: I am not trying to push a specific arrow, I just have their spine chrt on this computer, any manufacturer will have their spine charts online too!!!