Basically, my point is that it took a lot of work over a few hours just to get this far, and i'm still not happy. Whether it's the fault of Hugin that is introducing the noise from the darkest shots in the dark-areas or what, I don't know. But I doubt that any automated-program or in-camera settings can get anywhere near this with no user input, at least for now...
Don't know what your preferences are... but I did a quick PP using elements on your last image, using the following tools:
Reversed some darkening gradient effects to the right.
Contrast & Brightness
You can do much better with PS/ or even Viveza. Your shot has lots of potential !