I recently got into the whole overclocking scene and I've been aircooling for a while but I want to push this 1.4ghz fast

I have an Epox 8K3A and good ram it's just an unstable processor. What would be a good starter water-cooling setup...I'm just looking for northbridge/cpu cooling and the rad cant be TOO big ( 5 x 5 should fit anything bigger i dont think it will )
Thanks in advance