I would recommend one of the InSinkErator models with the stainless interior.
The badger models do not have a stainless interior and do rust through. The stainless models will not suffer this failure.
Consider the InSinkErator Evolution, or the new Evolution Select Plus disposer. Both have a stainless interior, are more powerful and quieter than the badger models. Plus they offer a 6 year warranty.
I hope this answers your question
Mike, The Home Depot Answer Manhttp://www.homedepot.com/buy/insink...