Someone a little over anxious?
I don't get how that would be settling. I'll go out on a limb and say the OP like shooting birds. Moire artifacts will show up in feathers and can be really, really bad. I have seen some Leica M9 bird shots that are wonderful except for the awful moire in the feathers that cause them to be throw-a ways.
If you can only "doubt" that moire will show up, then you should NOT get the 800e.
You need to know this for sure otherwise that is one hell of a $3,500 mistake. Many, many people are going to screw up on this one.
If there are repeating patters or lines, Moire will show up. To what extent, depends on the subject.
How Software can handle it, that will be another matter. Some say "it's easy" - which in my experience = "There is a setting in PS - so it will work." I have seen enough M9 images to know the difference and the "software" solution just blurs out the moire which removes all the detail you bought the camera for in the first place.