Upgrading my PC help me!

Ive been looking into upgrading my pc basically all i am keeping from my pc is my graphics card and hdd. So i thought my best bet not being the sharpest tool in the shed when it comes to building pc's to buy a pre-made overclocked bundle here is what i found and basically the thing i am least sure on is which processors are the best and is it worth it (future proof) this is what i found might be suitable for me??? any opinions help <3

http://www.overclockers.co.uk/showproduct.php?prodid=BU-171-OE&groupid=43&catid=2512&subcat=2518

well personally i find the best part about upgrading a computer to be putting it together but i guess its not for everybody and while i want to hate that pre bundled kit you really wont save that much money building it yourself. So if you really just dont want to builf it yourself then I find the I5-3570k kit you posted to be prett "future-proof" BUT since your getting a new Mobo anyways maybe you should see if you can find somthing in that price range for a I5-4670k since well its slightly better and costs the same. if not dont worry too much the 3570k is pretty freaken sweet from my experience with it and its not going away anytime soon.