what cpu cooler I need

[zomgdaboy]

Im planning to overclock my intel i5-3570k to atleast 4 Ghz and can some of you guys give me some ideas on some coolers (air). And please suggest coolers that can fit in HAF XM.

 

[stedaley]

HAF Xm seems a big enough case,

Ive heard good things about this
Evo+
http://www.coolermaster.co.uk/product.php?product_id=6755

I have a Megahalem Rev C which also does the job but any big aircooler with good reviews should do,