I have the just plain flying saucer that you buy at petsmart. Ingram loves it! I know you arent supposed to have plastic in their cage but he has never messed with it, I keep plenty of chew things for him. Its super quiet, he will run on it for hours.
I have never had a problem with it flipping over like someone else said, I did however have a problem with it moving and banging up against the side of the cage though
talk about annoying! I mounted it to a piece of wood, to hold it in place in the corner of his cage. All is good now and as a bonus he likes to chew on the wood.