Building a cheap HTPC

Hi all,

I am considering building a cheap-but-good HTPC, basically I just need something to work as a media player in my living room;

Please, does anyone have recommendations about MOBO, Video card, etc ?

It will be a media player only, so the HDD will be small (it will read from my NAS), and all I will need will be basically a powerful video processor;

I believe I'll need a GOOD video card with HDMI output for all video/audio formats, a "cheap" MOBO, not that much of memory, etc, etc;

Recommendations are welcome :-)

Thanks a lot,

Zetti