Greetings dear Overclockers community! This is my first post here, and I'm pretty computer illiterate, hence why I am here! So please be gentle 
Here is the deal, I've currently ordered a X58 chip with the i7-960 prosessor, Its arriving together with all the other parts this week in the mail.
But it has come to my notice that everyone says that the 'next generation' processors from intel, which are using so called sandy bridge archstructure is vastly superior.
What I'm wondering if its worth it to return the i7-960 with the motherboard and order a i7-2600k instead. It would cost me more so I don't really want to, unless the difference is noticable. My main concern is to run BF3 as smooth as possible. And to do that I have ordered a GTX 580 graphics card aswell.
TL;DR is the difference between i7-960 and i7-2600k so huge that i should waste time and money on changing it?
Of course the answer I want to hear is that the difference ain't that big, and that I should just stick with the 960, because I'd like to get my gaming rig together as fast as possible. Especially seeing as the beta to battlefield 3 is right around the corner.
So dear overclockers, what do you think?

Here is the deal, I've currently ordered a X58 chip with the i7-960 prosessor, Its arriving together with all the other parts this week in the mail.
But it has come to my notice that everyone says that the 'next generation' processors from intel, which are using so called sandy bridge archstructure is vastly superior.
What I'm wondering if its worth it to return the i7-960 with the motherboard and order a i7-2600k instead. It would cost me more so I don't really want to, unless the difference is noticable. My main concern is to run BF3 as smooth as possible. And to do that I have ordered a GTX 580 graphics card aswell.
TL;DR is the difference between i7-960 and i7-2600k so huge that i should waste time and money on changing it?
Of course the answer I want to hear is that the difference ain't that big, and that I should just stick with the 960, because I'd like to get my gaming rig together as fast as possible. Especially seeing as the beta to battlefield 3 is right around the corner.
So dear overclockers, what do you think?