Spec me a VERY quiet if not silent M-ITX build

[wiiija]

Hi all,

I'm looking to build an m-itx system, primarily for xbmc use, I have no real clue about self building these little systems (I've just purchased nettops in the past but never found them to be quiet enough).

I have a budget of around 500, give or take, only requirement is a nice case and a small SSD for the OS and large mechanical for storage.

Any help is appreciated, I have no idea what to go for,

 

[wiiija]

Looks lovely, gives me a starting point, though the mobo doesn't seem easy to get hold of now so may have to find an alternative.