What is the best indestructible, ID theft preventative mailbox available? My Mail Locker rusted out. Help!?

I live in a rural area where mailbox bashing has been a problem over the 14 years we've lived here. I bought the Mail Locker about 5 years ago and haven't had a problem with vandalism since however it has rusted out and bottomed out...mail now gets soaked when it rains...not sure how the water is getting in. Time to get something new. Anyone tried one with successful long term results and still happy with it?