why do u want a cpu cooler with intel build
u cannot oc a i5 2400 but only with k like i5 2500k
even an i3 2100 kicks the butt of any amd cpu and fx 4100 @4.5 is slower than i3 2120.
And why a z68 mobo of biostar
i think u mis understood that all i5 can oc.
U can build a cheaper build with an i3 2120 and asrock h61 mobo.
If u can increase the budget and wanna oc then i5 2500k and asrock z68 pro3 gen3
and if u gonna sli then asrock z68 extreme3 gen3
hope this helps