#48: this is your best design. I like the font of #1: it is clean, the font, while different than the buttoned up corporate fonts I thought of, is very nice.
#48 Also like that it has some shading in the color, that it is wider and that the bridge looks different.
Overall, might you try playing around a little with your ideas and trying another design or so? Perhaps something that doesn't feel as bounded as these designs all are (though the pictoral look was exactly what I originally envisioned). Changed brief a little bit to be less literal if helpful for creativity.