I think most folks think too hard when it comes to wheels. steel is better, alloy is best, plastic rocks, etc.
weight doesn't matter. if going from aluminum to steel affects performance, you need a new vehicle
like Inferno said...that's more of a tire thing.
then there's the strength issue. bottom line is if you mess up your steelies, you would have jacked up the aluminum ones too, and vice versa. they all get f'ed up sooner or later, so I went with cheapest I could find. ended up being steel.