That build is more designed for gaming on a budget than photoshop/office. Office being not very intensive and photoshop being more CPU and RAM dependent. No idea why anyone would buy an intel CPU that is not sandy bridge but it's not that big a deal.
570 gtx is awesome and you should really spend the $130 for a new LCD monitor so you can actually see all the graphics you just bought
if you are planning on sticking with that low res monitor, the gtx 570+i3 combo is silly. youd be much better off with an gtx 560ti+i5-2400. especially for photoshop which can very well utilize 4 cores.