I hate to ask the classic question, but budget?

I currently use a finepis s5600 which I've outgrown, I'm looking at DSLRs (the click and wait seems to have disappeared with going to a DSLR) After a couple of months of musing so far I've narrowed down to the 2 Nikon's - the d40 and d80 although the canon 350d is tempting at such a low price. As it's shared with my wife and she's uses in a home studio the d80 is actually the most likely....

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Toolset: Blender, GIMP, Indigo Render, LuxRender, TopMod, Knotplot, Ivy Gen, Plant Studio.