Looking for dirt-cheap low-wattage GPU

[tokyotech]

My company is allowing me to build a new desktop for web design and programming. I will be mainly using Dreamweaver, Photoshop, and Illustrator with dual monitors. I will not be gaming (not allowed to at work). The website serves videos, so I don't want to go old that it doesn't have HD video processing enhancements. What are a few slow low-wattage GPU's, yet with modern features, that supports this line of work?

 

[jaguarskx]

HD 4650 or HD 4550 if the HD 4650 is over budget.

 

[AKM880]

+1^.