Document Camera

I am researching document cameras for my classroom. Anyone have any suggestions? Here are a few I've been looking into. Thanks for any suggestions or info!

Epson DC 06 Document Camera http://www.officemax.com/technology/projectors-accessories/document-cameras/product-prod3970048

Optoma DC300 Document Camera

http://www.officemax.com/technology/projectors-accessories/document-cameras/product-prod3930350?history=nhoqng79|prodPage~15^freeText~document+camera^paramValue~true^refine~1^region~1^param~return_skus^return_skus~Y