i7-3770 VS i5-3570K

So , I am going to do an upgrade at my build
And I am wondering which CPU should I buy i7-3770 or i5-3570K.
Propably I will use for games and rarely for editing.
I want it to last for about 3-4 years from now !

Pc Specs:
CPU : i3-3220
GPU : Asus Geforce GTX 760
PSU : Corsair 600W
RAM : Corsair Vegeance 8GB Blue Edition 1600 Mhz
MOBO : ASRcok B75 Pro3-M
SSD : ADATA SP900 120GB
HDD : WD 1TB 7200RPM