The i5 3570k is not that much slower then the i7 3770k in photoshop, and other adobe programs. Also you will see no gain in gaming with the i7 3770k over the i5 3570k.http://www.tomshardware.com/reviews/core-i5-3570-low-power,3204-6.html
Here is a build that is perfect for you. http://pcpartpicker.com/p/iuzB
You can chose the case, since i dont know what you like. Adobe programs use cuda cores to render out images and video, so Nvidia is better than AMD in this case. You have head room to SLI later on, But if not you can alway get a 500w psu instead to save some money.
edit: You wont be able to tell the difference in gaming or photoshop with the 3930k over the i7 3770k, It is not worth the price difference.