Well, I think the combination of 2 pounds of crystal and amber syrup (which has crystal in it already) may be too much crystal. I'd either get rid of a pound of crystal, or change the syrup to light syrup.
I LOVE centennial hops! I'd move the 30 minute addition to 15 minutes for more flavor, though.
With an OG of 1.090ish, two packages of yeast are a good idea!