I'd go with the i5 - you won't see much difference in gaming with the i7
If you're looking for improved fps and detail settings then the GPU is more important
some games like crysis 3 do require quad core dont they ?
i wanna enjoy a better gaming experience
The i5and i7 differ in that i7s hav hypertheading - most games will not benefit from this, though this may change when DirectX 12 comes in to play. For now though, better to spend your money on a better GPU