Stu I would pick #2 as my favourite because of the vanishing point, the different textures and the colours. I'd leave the sky in although I might edit it a little to get more detail in the clouds.
Re the first shot I hope you don't mind but I had a play with it in Macphun's Intensify app and came up with this...
I reduced the highlights and added some highlight structure to just the sky area of the shot. I also fiddled just a little with highlight contrast. Then I took it into PS Elements 13 and lightly (7% opacity) cloned some of the darker cloud over that bright spot to try to tone it down a little. What do you think?
By the way Intensify is a Mac only app.
for Mac owners,
for Windows.