I would use this mobo:
http://www.asus.com/products.aspx?l1...85&modelmenu=1
It has an onboard gpu and i would use it! In fact it has also a hdmi output.
The mobo is passively cooled and very energy efficient. Put a good cpu on it and it plays hd content without any problems.
I recently build a system for myself with it and it is great.
I would pick a seasonic psu because they are very silent and energy efficient.
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