I've bought the HP 250 with N3510, I can confirm it's absolutely fanless.
The harddisk is noisy. The laptop itself has a cheap look.
The processor is good for a sound player, and much more: no lags in windows seven and everything is fast enough.
All in all, I'm very happy with it !
You could always swap out the HDD with an SSD.
I got this laptop from the UK (not available in Sweden) recently, bought a outlet-converter. Downside is keyboard layout is not native.
Anyway, Windows 8.1 was pre-installed and slow out of the box; browsing, generally navigating around. Even after uninstalling bloat and mcaffee.
Switched to an SSD (which is a but cumersome with this model, but not THAT hard, see instructions here: https://www.youtube.com/watch?v=9NEIiY-p7Z4
) and clean install of win 8.1 just now. With launchy, evernote, dropbox, everything, keepass, wunderlist, eset nod32, viber and palemoon with 10 tabs open everything flows smoothly.
edit october 2015: I've experienced slow loading of webpages for more than a year, tried all sorts of things to fix it. I can at this point not recommend this laptop. More info of my problem here: http://h30434.www3.hp.com/t5/Notebook-H ... -p/5055350
On this video, there's a fan visible...