It appears that there are basically 2 types of them (when it comes to tray type) - those with poly tray and those with metal tray. Which one is better (and why)? I know that poly tray should give a lighter product and it won't rust, but is that all?
What other characteristics should we be looking for? Wide wheels? etc ...
Oh, need it for general usage, not excluding short distance transportation of soil, sand, rock and other heavy and rough materials.