I just replaced the grates in my Weber with new cast iron grates. I did not realize how heavy they would be, but they are nice. The trick will be keeping them maintained, it seems like is is going to be a lot of work.
I am getting ready to throw some chicken wings on the Weber to try the grates out for the first time. I will let you know how they work.
For the Wings I found the below rub in the cabinet so I decided to give it a try.