Your third attempt is much more pleasing. I never rely on software to make my HDR pictures. It's for the same reason I don't shoot jpg. If I'm going to make a picture with extended dynamic range, I shoot 2, maybe 3 exposures in RAW, and put them together myself in photoshop. That way I can pull out the dynamic range where I want it, and where it makes sense.
Once again, your last version is very nice in terms of dynamic range, and colors. I might rethink the crop however. There seems to be a bit too much foreground for my tastes.