Power thing is an issue. I built my current setup as cheap as possible because I needed a desktop for work. Now as I transition into a new job with a higher pay grade, I would like and need something with more power. I was hoping to move to my A8 into a nas eventually, but never considered the cost/energy aspect.
I guess I could also try to roll my own kernel, but its been such a long time since I played around with linux at that level (redhat 4.0 days).
I guess one way to find out is to try it (as soon as I can build a new system on the side) and see if it works, if not, put in a more power efficient mb/cpu combo.