With that cam you dont need a head that max flows at .600 or .650 lift. Seems like the smaller port volume of an iron head would be more suited to your cam. It's a mainly street driven car right? The thing an aluminum head would give you is the option to go bigger and better with the rest of the combo in the future.
My 2 cents right now is a nice set of ported iron heads would work well for you. I would think with the flood of Aluminum heads on the market that a set of ported irons could be had very reasonable.