Whether on the motherboard or in the CPU, is integrated graphics plenty good for the non-gamer or merely adequate?
There seems to be a general disdain for integrated graphics. Is that only because most people who pay attention to computers' innards will settle for nothing less than the highest possible gaming performance or is integrated graphics a dog, to be avoided?
Unless you plan on using your computer for 3D gaming, I see no reason to avoid integrated GPU. Any current iGPU will work very well with anything 2D including movie playback and Photoshop.
As far as bang for the buck goes, I think you should set a budget for that. Some AMD CPUs @ low price point are a sweet spot (what Mike said). But i5 2500/2400 (K or not) will get you significantly more bang per $ (and per Watt) even if you do need to pay a bit more. Then again if light Photoshop work is as demanding as your work gets, you might not need it.
Also consider the motherboard's features you'll need - USB3, SATA3. Then price all you part (RAM, mounting kit for your Minja, SSD?...) as a package. once you see the total sum of each platform it will be much easier to decide.