If you are in Canada, I'd look at International tool box as well. It's the best bang for the buck.
You would be hard pressed to find a better box for the price, especially the SHD series.
You can get decent prices through Costco.ca, they deliver free to your home!
Gray makes there own boxes, but they are over priced in my opinion, and the Marquis series of Gray which is there high end is Chinese.
If i was you I'd google all the boxes you are interested in and look at the weights and roller bearing capacity vs price.