My problem with the metal grilles is dust. I live in a dusty area and my previous cabs with metal grilles (GK and EAW) always had a horrible amount of dust visible. I'm sure the Rumble has just as much dust inside it, but due to the cloth I can't see it 
(The Rumbles grille is easier to remove to clean also, not that I am in that habit of doing so).
(The Rumbles grille is easier to remove to clean also, not that I am in that habit of doing so).
