Sam's Club in Los Angeles had this hand cart yesterday. I picked one up and it seems extremely solid. Might be worth checking out if you're looking for a cart and have a Sam's Club nearby. Rated for 1000lbs as a cart, 800lbs as a dolly.
Milwaukee Convertible Hand Truck - Sam's Club
Buy Milwaukee Convertible Hand Truck : Hand Trucks & Utility Carts at SamsClub.com
www.samsclub.com