The Biggest Selling point of my Brinkman Pro Series grill, was that it has CAST IRON burners that last 5-6 years, instead of replacing wimpy stainless tubes every year.......I grill A LOT.
I don't grill 40 hamburgers at once, but I DO like a big 6 burner wide grill, as it allows you total control whether to use direct or in-direct heat.
Cast Iron Burners last a long long time!
Replacement Part 29351 4 Pack Brinkmann Gas Barbecue Grill Cast Iron Burner on eBay!