I have a system with Core i5 3570K + Hyper 212 Evo, Asrock Z77 Extreme4, MSI R7950, Corsair Enthusiast TX650. I intend to overclock my CPU around 4.2GHz. Is Rosewill Challenger sufficient enough for cooling the system - are the fans good enough? It is $49.99 at newegg. If Rosewill Challenger is not good enough, then I can go for Antec 900 (available at $69.99 @newegg after rebate and discount). I really dont want to go for the extra $$ with Antec 900 if Rosewill can do it for me.