Kim wants to switch the living room furniture around, and that includes swapping the big desk for an armour type desk that folds up. Cheetah's full tower won't fit inside, so I might take it to the office to crunch 24/7 and build a smaller rig for the house. This would be a good move because I can write off the electric at my office, whereas I can't at home.

Looking for some ideas on the most power efficient rig to build up, since I've been out of the new hardware loop so long. The most taxing thing it will do other than crunch is photo editing. Kim likes to use the latest Photoshop and Lightroom programs a lot.
Largest case I could do is a mid tower on this.
Thanks for any ideas.