Your post was still suggesting something LIKE a VIA Eden platform. The OP uses GIMP (and potentially Photoshop under Wine). It was a rubbish idea, just to save a few watts - same price and much worse performance - why?!
Not being a GIMP pro by a long shot, but I really cannot see the benefit of multi core cpu here. Its not like processing 3d scenes, where yes the more cores the better. In my granted, small understanding of what is involved in digital photography, it just seems overkill to save a few seconds processing when you do one scene at a time.
Now correct me if I am wrong in my understanding of digital photography there. I don't do it, so simply assuming you will be editing a single picture at a time. Ok you can have multiple pictures open, but you need RAM for that, not cpu power.
And single scene performance will not be that much worse between say a 2ghz, single core and a I don't actually keep track whats "hot" now days, but say a 2.3ghz quad core.
You also seem to have something against multiple cores, I don't know why considering Linux is a very capable SMP OS and even for desktop use does very well out of it. If he gets into his photography he can leave GIMP processing on one core and run everything smoothly on the other (as an example).
Oh, no I am not against multi-core at all, got a dual core AMD myself, but that runs windows and used for games. Just here it does not seem that necessary.
Heck, with all those useless cores he could even run Windows XP in KVM (with hardware assisted virtualisation which a VIA CPU doesn't have) to use Photoshop CS with the virtual machine making full use of one or two cores, whilst he does everything else on the other.
Now for that, yes sure, great idea, However OP did not state he wanted to do this. (What does CS stand for in Photoshop CS? I am guessing not counter-strike

haha)
I was simply suggesting what hardware OP could get that will still get the job done, but not waste as much resources, considering how much electricity costs now days. Obviously if he wants to dabble into other "arty" things for instance 3D, I would never dream of recommending something like that.