Fist two would indeed make excellent wall art - I could see IKEA selling these all day long (a good thing) as I think they're very urban and abstract images.
#3 I love because of the detail, and all of the shadow lines that intersect the physical structures - nicely spotted!
Well I went to max speilman but tbh think you could get same print for cheaper online. I got three and the were doing half price on second one , think they were 17.50 each otherwise