Another suggestion is Ikea for storage boxes, the one that i use is the KNEP. It comes with strong rope handles that come in handy when lifting.
http://www.ikea-usa.com/webapp/wcs/stores/servlet/ProductDisplay?catalogId=10101&storeId=12&productId=26647&langId=-1&parentCats=10115*10298
http://www.ikea-usa.com/webapp/wcs/stores/servlet/ProductDisplay?catalogId=10101&storeId=12&productId=26647&langId=-1&parentCats=10115*10298