I'm not sure this will end up the cheapest way. I built my last windows box from bits, because it was very important to me to have it silent, and it ended up much more expensive than a dell or equivalent would have been. By the time you have put in a hard disk, a mother supply and a power board, you are approaching the 250 or so which a whole new box nowadays costs. (on rereading, 'mother supply' is obviously something all computer need. I'll let it stand.)

acb