^^^Consider the mobo with a HDMI out...
They're in AMD platforms and u're better off with an AMD solution since its a MEDIA center PC (AND strictly not gamin cos if its gamin, u're not doin justice with an AMD proccy)
Get at least a 500GB(or 500GB X2) 16MB drive frm Hitachi, Seagate...
2GB RAM is recommended(Needn be low latency ones); 4 GB is fine with Vista X64..
And u missed out on the main component of any media center PC: TV tuner card!!!
Get a TV tuner card from comps like Pixelview, Compro, Pixelview(tat offers a wide variety of VIVO options)
Get a small cabinet( mostly ur mobo is gona be a micro-ATX), but ensure its roomy and has a couple of fans(not too much), to make it breathe air!!!
Good to go!!!