I'm on the A bandwagon, as well.
That said, it's a tough choice for me between A and B. I like A for it's feeling of depth (the Mountains appear to stretch far back into the image) and reflection (sky reflecting off of the water). I love B for it's more nuanced sky, which seems to open up into the "great unknown" (vastness of unexplored stars and galaxies) on the upper left corner.