the intel HD 2000 in the i3 would be enough for playing videos on hulu and netflix.
its also more than enough to do the tasks you require.
as for the AMD system, you can undervolt and underclock it if you need to, should be able to lower the power consumption to an acceptable level. the gpu you should be able to buy a cheap 6450 or 5450 to use.
i'll try undervolting and use a kill a watt, if the idles still excessive i'll part it out and get a g620, thanks for the help