I could've sworn that I saw a whole 10 page thread on this somewhere.
But I'll save you the time.
If you're only going into that very basic level of photo editing (ie. photoshop), then you could probably go with an AMD. Unless your a 3D animator or you do video editing for a living, an Intel just seems overpriced and not really advantageous for that basic level.
If you're looking for a specific chip, I would suggest a 3200+ Venice
. It's more than enough for gaming and easily overclocked to a 3500+, but not with the stock cooler.