Yeah I agree with that psu aswell, for what it's worth.
Considering you can't really mount any type of water cooling, and you can't have very high heatsinks, you're stuck with low profile coolers. Not that it will affect performance noticeably, but it forces you into a certain segment.
Here are some suggestions as to what would work for your scenario:
http://noctua.at/en/nh-l12.html
http://www.bequiet.com/en/cpucooler/570
http://www.silverstonetek.com/product.php?pid=368
There are plenty more good ones out there, these are a bit pricey for sure, so if you really want to cut down on price, you could always snag an intel stock cooler for probably real cheap wherever you live.
Alternatively you can if you get clever use a closed loop watercooler, although there wouldn't be any cooling gain to using one at this level, and you would most likely get better cooling out of using one of the aforementioned air coolers. It would only be purely preference. You could probably cut out the optical drive bracket and cut a hole in the side panel and slap some mesh over it to fit a radiator, but like I said completely and utterly a waste of time, especially if you plan on using this as a media center where you would most likely put a blu ray player in there.