smekera :
Im gonna use the Intel I5 3570k and im gonna use it for gaming and for overclocking.The case is Antec 900
Of the two you suggested, the V8 is by far the superior cooler, and I have seen people who have combined it with the Antec 900 case, so it should fit.
Additionally, since the case you're getting has a window, the V8 just looks cooler... IMO, of course.