Hi MMX.
I’m not sure about #1 & #2 of these. The B&W looks great, but the buildings seem to be leaning slightly. It could just be my eyes though. :? I love #3, it’s a great shot. #4 seems to have a bit of a halo, but that could be just the way the clouds were. I think there are too many trees blocking the building in this.
1 and 2 – this is probably caused either by lens distortion or by perspective (maybe both). I wish i had the Canon TS-E 24mm 3.5L for this type of photos.
4 – there was a visible halo (as well as in the 1st photo), I tried to get rid of it but didn´t want to change the color of tower so it´ still slightly visible.