I plan on building an outdoor kitchen island for the BBQ grill etc. I picked up some galvanized steel studs from Lowes, but in retrospect they seem kind of flimsy when considering putting heavy concrete or granite counter on top of the island. I know the concrete board will help brace this, but am now wondering if I should use wood instead? Just wanted to see people experiences, especially if they used studs from Home Depot or Lowes.