I also was thinking along the same lines but decided in the end to go with
an AMD zactate all-in-one motherboard as it is just less expensive overall.
It runs between 10 and 18w and I dual boot between Debian and Windows 7.
There are some newer CPU's out there with less power consumption and the
Intel Atom motherboards will also work equally well. This setup is fine for
my office computer and I do not even think of playing games on it. I do
process graphics for art work on it though and Photoshop runs fine. When
the ARM boards eventually come down in price I will try it again but this
board was under $75 but I had the memory HD and case on hand already..
Some day my Raspberry Pi will arrive and I can play around with that
to replace my Home Theater computer which is running on an older AMD
Athalon 64x2 which is a real energy hog.
