What CPU works best with:

if you want the overclocked one it will be the i5-3570k which in my oppinion is more than enough to handle both of those cards and won't bottleneck you at all.

Ok, so since I'm using CyberPC, they will overclock it for me right? And If I chose the Extreme overclock option, how much faster would it be? I'm a complete noob when it comes to hardware, sorry. Also... what is bottlenecking?

If they state you are getting it overclocked you should expect it overclocked, confirm this with whoever you're buying from first, you will normally have to pay more for them to overclock it before shipping.

The best way to describe bottlenecking is using the image of a beer bottle, fat at the bottom and skinny at the top, the bottom would be the graphics card, the top would be the cpu, although the graphics card is powerful, it can't all be squeezed through the small cpu(top of the bottle) so you're wasting some of it's potential, does that make sense?

the setup you're looking at is more of a pint glass, big at both ends. maybe too many alcohol quotes?

Haha, thanks man! Now the question is... Is the HD 3970 the ideal gaming card for me...

personally i've always preferred nvidia, i've had compatability issues with amd cards in the past and never had half as much problems with nvidia cards, but that's literally just personal preference, I myself have the gtx 680 and it's an awesome card, can play pretty much any game maxed out at well above 60 fps.

May I ask what your mobo/cpu setup is?