You need to be careful that the cooler doesn't:
1) Overlap the PCI-E socket
2) Overlap the memory slots
Lots of low profile coolers will do this depending on the motherboard. I have an Asrock Z77e-itx and its a nightmare finding coolers that don't obstruct the PCI-E slot. I've just settled on the stock cooler and done a minor OC on my 2500k.
Best to research your motherboard make and see what peoples experiences have been with regards to low profile coolers other than the stock one.
1) Overlap the PCI-E socket
2) Overlap the memory slots
Lots of low profile coolers will do this depending on the motherboard. I have an Asrock Z77e-itx and its a nightmare finding coolers that don't obstruct the PCI-E slot. I've just settled on the stock cooler and done a minor OC on my 2500k.
Best to research your motherboard make and see what peoples experiences have been with regards to low profile coolers other than the stock one.