Why you really don't need to buy in i7 CPU for gaming (or even an i5).

[Lusche]

Some games are pretty cpu intensive like msflightsim, arma2, gw2, anno ...
but for those there is no need for an i7, but you will notice the difference from a phenom? to i5.

i7 is needed for encoding, compiling, cad, ps and other things, but not for gaming.