I guess the question is really how effective is software based anti-aliasing, and how often is it required in real world situations?
If its simple and not time consuming, it may be preferable to apply a little post process anti-aliasing where needed and go with an D800E.
Might it be predominantly a workflow question? Moire has got to be a tricky if you're doing a lot of resizing and/or digital presentation, or video. If you're mainly working with RAW for print enlargements, maybe less of an issue?
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