I'll make it simple - Good air coolers are cheaper and more reliable while performing about the same as so called "liquid cooler" from corsair, nzxt, tt, arctic and other crap.
unless you have at least 140$ budget for something like Swiftech H220 X2, don't bother with liquid.
You can comfortably play with over 60FPS avg on your mildly (4.2-4.5GHz) overclocked i5.
Nice to see some smart people still on this forum,
cant agree more.