Yes... I should have beheaded tourists! That's the great thing about digital... you can always go back and keep fixing it!
And Yes, it's on Independence Ave. between Air&Space and the Botanical Gardens.
One thing I find with Photomatix is that I get a lot of grainyness... I did some denoise when playing with the raw images and some despeckle in GIMP, but I have a hard time getting rid of it all. In this case, it was late sunset and I'm sure the camera shot at 1600 ISO which will do that. Are others out there using your Auto ISO setting, or are you pegging it somewhere and working around it?