Now I know this is a fairly impossible task, as the more silent and the more cool you get, generally the more expensive you also get.
I'm hoping to spend less than £20 (delivered), a lot less if possible. I'm a little out of touch with the heatsink market, so I need some help plz
My current cooler is an (old) Coolermaster XDream heatsink with an Antec 80mm fan on it. Id estimate my current cooler puts out about 30dBA (judging by the fan specs), possibly a bit more. From running SiSoft Sandra its got a thermal resistance of 0.41C/W. My cpu gets to about 52C full load, 48C idle.
Any suggestions would be great. I've seen the following heatsinks which look like they could be good runners:
Arctic Cooling Copper Silent 2L Rev2 (not the temp controlled editions) - £10
Sharkoon HPS2 - £18