Backup camera suggestions

I just bought myself a 2003 4Runner limited 4x4 with only 80,000 miles and I'm excellent shape. It's silver and needs a little love. The first modification I wanna do is a back up camera/Bluetooth stereo system. I wanna keep the price low, but do need a durable camera, as I drive over salt in the winter. Does anyone have suggestions of what brand, what model, and where I should purchase it? Any help would be greatly appreciated!

 

I really like what kenwood offers. I have had good luck with multiple kenwood units.
http://www.kenwood.com/usa/car/navigation_multimedia/dnx573s/

Dont believe it comes with a back up camera but any quality brand camera will survive well in a winter environment.