Neff Bars ...need advice

Hey Guys I'm looking at getting a set of nerfs for my SSM Prerunner. I'm not concerned too much with the brand, my concern is mainly how long they will last. I live in Southern MD and we usually get 3-5 snowfalls a year where the roads are treated with salt and sand. I take care of my stuff, so I tend to wash, wax etc very often. GenerAlly speaking how many years can I expect to get out of a quality black powder coated nerds vs stainless steel? I know this is a wide open question but I'm looking for your experiences. I'm looking at a set of Westins or Max Mates.

 

My Westins lasted 10 years in PA.

 

Thanks...I've heard horror stories of the powder coated nerds rusting out after a few years.