A forged part is stronger, lighter and less porous than a cast part. If it is properly chromed than it should last as long/longer than a cast chromed wheel.
Salt will eat thru anything though, best to run the stock wheels in those conditions.
Mine are polished aluminum and as good as they look they are a major PITA to keep up.
You can always get your wheels powder coated and not worry 'bout it.

 

I had a set of centerlines on my 99 an they were DESTROYED after 2 months in the salt. They pitted so bad that they could not be saved even with mechanical polishing. (if i wanted to spend the $$$ they could have been polished though). Upkeep is a real pain for the northern guys in the winter.

 

long live the south! also aside from the weight, it still takes alot more torque to get the larger diameter wheels and tires moving too