The list author says: "I've had a pre-made Dell PC as a dedicated HTPC for a while now, and it just doesn't cut the mustard. I've decided to build my own, and after scouring the interweb and various forums, I have come up with what I consider a sick build for around $400! Notice the inclusion of a power supply with the case and an integrated GPU with the processor - for our purposes this is more than adequate - and I stepped up to 8GB of RAM because... well, why not? optional items would include: wireless network card, additional hard drive, slimmer/more stylish case, additional discrete graphics card for gamers."
"normally i would say to get a separate, discrete graphics card, but this processor and GPU are actually REALLY good for our purposes, as this build is not intended for hardcore gaming. Plus, it's crossfire-ready..."
"solid, reliable SSD for really fast booting and wake-up (versus HDD). 128GB is enough for an operating system as well as some other programs and on-board media if necessary. there are cheaper ones out there, but be careful. i would also buy a much larger - min 2TB - external HDD for media storage (not included in this list). also includes mounting adapter, which you NEED!"