Choosing a cpu cooler for my z77 sabertooth

[SargeK155]

Im looking to finishing my build by adding a good cooler so i can overclock.
Case: CM storm trooper
MB: Asus z77 sabertooth
CPU: 3570k
I would like to reach between a 4.2 and 4.5 overclock. The coolers i have been looking at are the:
Cooler master x6 elite
Cooler master tpc 812
Thermalright Venomous X
Prolimatech Megahalems

I might be willing if necesary to go with a corsair h100 though it would be stretching my budget. So which cooler will be giving the best performance? and making me reach the highest overclock? Any advice is greatly appreciated. Also if there are other coolers i should consider i might have missed please post them. I should say the Silver arrow and NH-D14 are both a bit too large and ugly for my taste which is why they are not on the list.

 

[tinmann]

I would go with the Prolimatech Megahalems for their track record. I like the fact that the Cooler master x6 elite can be installed Horizontally but I'd have to know more about that product before recommending it.