Am going to try one of these as it was just over 7 quid so not a big deal if it is no good. http://www.arctic.ac/en/p/cooling/cpu/461/alpine-11-plus.html
I got mine from Scan but they don't sell them anymore, shame because they got great reviews Just found one here http://www.amazon.co.uk/Titan-Passi...=2025&creative=165953&creativeASIN=B002QHCS1O
You might consider the XIGMATEK Praeton LD964 £12.99 inc. - Dimension: 104(W) x 93(D) x 30 + 15(H) mm (with Fan) Definitely not bad, just not the quietest one.
http://www.silverstonetek.com/product.php?pid=262&area=en I've got one of these on an 1155 i3, and also a 775 version on a C2D. They're pretty good, inexpensive, and really small. They won't set the world on fire with cooling performance, but they're tiny...
Went with the Arctic Alpine 11 Plus and fits perfectly with a bonus is that it has a white fab which fits inwith my color scheme rather nicely. http://forums.bit-tech.net/showthread.php?t=259473 So have some +rep sir.