I would have the said the classic original...but that clone looks cool as fuck, plus it plays the Famicom cartridges....it depends how into it you are I guess, personally I wouldn't bother getting any Japanese cartridges so I have no need for the Famicom support...
I'd go with the original as there are some on that link for $15, and you can't argue with that. As opposed to $60 for the Nex.