I like the second one with the horizon out of the centre of the image. Although a centrally located horizon does work in some case, e.g., reflections in a water body, etc., in this case, the problem with the horizon in the centre is that the viewer is left to figure out which part of the image is more important, the sky, or the mountains. Since there are no significant clouds to provide detail in the sky, the mountains become more important thus raising the horizon to include more of the mountains and foreground makes a better picture, IMHO.
That the frost and, if you look carefully, the snow on the mountains has a bluish tinge to it could be a white balance problem which often occurs when you are shooting snow scenes, or scenes with lot of white in it. In my case, when shooting such scenes, I try to use an exposure compensation of +1 to +2 and this usually works to remove the bluish tinge that can occur under these conditions. You might want to experiment to see what works in your case. You should also be able to remove this cast in whatever processing software you are using. Of course, if is always easier if you are shooting in raw. If you do a Google search on "correcting blue snow in photographs", or something similar, you should find plenty of information on the subject.
Otherwise, this is a very nice image. I like its clarity. I would be curious to know where it was taken - always nice to let folks know these things, together with other technical stuff.
One thing that always interests me about mountain photos like this - I am assuming that these are the Appalachians in North Carolina, that you photographed - is that, if you look at all the peaks of the mountains, they all appear to be at roughly the same altitude. This suggests to me that what we are seeing is a very ancient plateau that has been uplifted by forces within the earth and then eroded by external forces of wind and water to shape the topography today. This isn't relevant to your image quality, just a casual observation by someone with a significant geological background.
WesternGuy