That RAM has *huge* heat spreaders, but it's the only one I could find (in the UK) running at 1.5V when I bought the parts. I was originally aiming for a Noctua D14, but there's no way I can make it fit with those modules. I'm only using slots 2 and 4 now, but will probably buy additional modules in the future, so ideally it should be something that doesn't interfere at all with any of the slots (I know, it's not easy!).
I don't have strong height restrictions, since my case is a Corsair 600t, which is as big as a hangar.
Ideally I would like something that runs reasonably quiet. I'm only planning to do moderate overclocking, and anything will be an improvement over the stock fan, which is rubbish, but I'd like this processor to last for a while!
So far, the only viable choice seems to be one of the Corsair water-cooling solutions (the H70 most likely) but I'm not too happy about buying something that is twice as expensive, equally noisy and less efficient than an equivalent air cooler. If there aren't any other good solutions the H70 will have to do...