Does even one need anything more than dual core for gaming, let alone a 6 core processor? Atleast as far as now or heck even 2 years atleast down the line?
This "more core the better for gaming" story is long dragged ever since q6600 days even when people prematurely bought a b3 stepping, when even a e7xxx series satisfies their needs as far as gaming is the primary reason. In any case, this will something which would end up as a discussion, but putting up such discussion on a thread where one wants a config advice will simply end up confusing the OP.
Keeping the OP's budget in mind, stick to Udit's Gigabyte GA-EX58-UD5+ Intel i7 920 combo. As for the rams, better off importing one.However, keeping the primary usage of the OP, a P55-UD2+ i5 750 with a good 4GB dual channel rams will be enough for a long time as well.
The question is not "whether you have to get LGA 1156 or 1366?", but the question is "Do you really want to spend a rig primarily for gaming but spend 17k on a board alone?"