Integrated graphics should be fine.
Modern Intel and AMD cpu's include the graphics on the chip vs. the older way of including graphics on the motherboard.
The integrated graphics from either Intel or AMD is plenty to run two monitors at 1920 x 1200.
Normal processing and HD playback works well. Today, AMD has stronger graphics for gamers, but that advantage may disappear when Intel Haswell launches in June.
If you will be using higher resolution monitors, like 2560 x 1600, you may need a discrete graphics card. But not necessarily a expensive one if you are not a fast action gamer.
Some adobe apps can use the CUDA capability of Nvidia discrete graphics.
I am no expert there, but I think the capability can come from low level cards.
Check your apps.
If you will do lots of photo processing, buy lots of ram. I think your apps are 64 bit enabled, letting you use ram instead of hard drive workfiles.
Flight sim FSX is very cpu intensive, so an Intel quad would be better there.
Post your budget, and what you think you will need.