I like the type on all of these and the color scheme on #47, and think the concept is strong but could have better execution. Maybe there needs to be some hint at the building's outline? I wouldn't know what I'm looking at.
#44 is interesting. Kind of like a cubist painting. Too colorful and abstract, I'm afraid. #43 has the strongest graphic representation, but it comes off as too heavy. Maybe there is some combination of #47 and #43 that would look good?
I like how you are thinking outside the box on this one. I was wondering if you could give me another concept, but could you try a geometric abstract shape to the left of the text? Something with some curves that is kind of sculptural so I can have two styles to consider, and something to contrast these hard edged designs. Something like these perhaps?
http://i610.photobucket.com/albums/tt190/ClearSpace/classic-modernism.jpgThanks!