CPU cooler help

[Clicky999]

I have just a stock CPU cooler and I want it to be cooler so I would like some suggestions for what CPU cooler here are my pc specs


Intel I5 760S
Asus p7p55 LX
Radeon Sapphire HD7850 1GB
6GB DDR 3 RAM
Antec ATX case

It will have to fit and be in a budget of £30

Thanks In Advance

 

[clutchc]

1) I would have to know the model of Antec case because they vary in depth.
2) Do you plan on overclocking the processor?