What graphics card you looking to get for the new system?
To be honest your hardly gonna see much difference dependant on what gpu you get. (dual processor gpu)
If you have the 3570k with a hyper cooler you should easily get over 4.2 GHz (even easier with that board as u hav the OC Genie)
You should look at getting a SSD drive for your OS.
I5 3570k oc'd 4.3Ghz, CM hyper 212+cooler, Gskill 8gb 1600Mhz, Gigabyte 7970hd oc edition, msi z77a-g45. Samsung 830 256gb SSD, WD cavier black Hdds