This is my current situation. I download HD files (x.264, h.264, etc.) onto my desktop from newsgroups. But it seems my system can't cut the mustard and chugs when i try to play a 1080p file. I'd like to build a HTPC that can play all media and codecs flawlessly. I don't need a Blu Ray drive, because i have a PS3. I would like a sound card that will output to a 5.1 or higher receiver. Or is onboard sound good enough? I would need a DVD-drive to transfer my HD files onto the HTPC. Or maybe i'll just get a big enough USB key. Is there anything else i'm overlooking? Recommendations on a motherboard and video card?