Dynamic Range Really isn't as important as you are lead to believe.

As Tony said, you start by saying wide dynamic range isn't important and then show us why wider dynamic range would help.  This is odd.

If you had wide enough dynamic range, you wouldn't need multiple images.

If you need more DR than the camera provides, shooting a few RAW images and combining them in post processing with appropriate software is likely a better technique than just stacking RAW or in camera HDR with jpg.

The idea of a comparative exercise is to limit the number of things that change, so that you can isolate what is important. You change both camera and technique.

Therefore, it's not obvious that HDR jpgs outweigh RAW, as there's no way to tell if the differences are due to the different techniques or the different cameras.

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