My mate just bought an OCZ Vertex 3 60GB and a Xigmatek Gaia SD1283 for £102 (I think) shipped from Amazon and he couldn't be happier. Except for the f*cking gay sticker they give you with the SSD. They could supply a nice square plush label like other manufacturers, but instead they give some piece of sh*t that no-one in their right mind would stick on their case.
/rant
But anyway; he specifically got this cooler because it mounts on AM3 and blows the air towards the rear fan on the case; instead of either up towards the top or down towards the GPU. I know you're running AM3 so this may help your decision. Three coolers that I know of that have this mounting ability out of the box:
Deepcool Ice Matrix 400
Xigmatek Gaia SD1283
Zalman CNPS10X Performa
And the Thermalright TRUE, but I'm unsure whether the new models come with the right bracket. I've had 3 TRUE 120's, only 1 came with the right fitting for the rear airflow.
If your talking to me Scam im actually on Sandybridge if you look at my specs lol.
Eitherway once i get a new cooler im giving my old one away to my mate, the original xiggy SD1283. It cooled my old X4 pretty well but its not to great on the 2500k its more just better than stock. Good thing about 1155 is you can mount in any direction.