Everytime the conversation goes like this:
"Get a crappy AMD CPU because some games are GPU limited and you won't notice a difference. "
By the same logic get a Pentium G870 (probably better than any AMD cpu in a lot of games), and go all in on GPU.
World of warcraft, Starcraft 2, Shogun 2, Civ V, Borderlands 2, Skyrim, Anno 2070, Crysis 2, F1 2012, Arma 2, Rise of Flight (
http://www.hardware.fr/articles/880-13/jeux-3d-crysis-2-arma-ii-oa.html) and a lot others are just a few of many games. It's not like in the age of console ports every game is Metro 2033 and is heavy GPU limited (except that in this game also, Intel runs better).
The above mentioned games are massively popular, and unless someone wants to play only AMD fanboy cherry picked titles, he is better off with an Intel CPU.