Old Main in HDR

I went for a hike around the University of Arizona campus around sunset and took some HDR exposures of Old Main, the oldest building on campus.  I bracketed 5 exposures from 1/350 seconds at f/8, ISO 400 with my 24mm lens to 1/20 seconds at f/8, ISO 400.  Here is the first exposure, the shortest:

 And here is the last, longest exposure:

Using Luminance HDR under Linux, Here are some of my favorite combines:

This used a Reinhard '05 operator.

This was the most colorful with a Fattal operator.

This final one gave perhaps the best contrast in the sky but was a bit low contrast in the foreground scene using a Mantiuk 06 operator.