Yep, ran 10 hours of small FFTs overnight and ran blend for about 8 hours today and came through unscathed, it seems I got really lucky with the chip. I haven't tried a lower voltage or a higher OC but I think I'm quite happy with this tbh, excellent OC, 1:1 memory at 800mhz, and voltage well within spec.
I've just swapped out my two 120mm case fans that came with my build for a couple blue Yate Loons and my temps. have dropped a few degrees and the whole PC is much quieter. Really rather impressive considering the spec. its running at and the price I paid.
I'm using the Akasa 965 to cool my CPU because in the reviews I read it comfortably outperformed the AF Pro and is cheaper to boot. My experience with it seems to back that up, great budget cooler.