Since you included Photoshop in your query, i'll recommend Nvidia for the video card.. If you do not have any gaming desires at all, the GT220 will fit your needs nicely.. If you are not sure on your gaming needs and/or may go that route in future, your budget enables you to opt for the GTX 460 768 MB..
What does Photoshop have to do with Nvidia? CUDA does not benefit ANYTHING on Photoshop.