I beg to differ. I think number 3 has the most potential.
Thing is all your horizons are slanted to the right. When taking landscape that is one of the things you have to watch out for religiously. You can also fix the slant in PP too. 1 and 2 can also really benefit from a GND filter to balance out the exposure between the sky and the ground. If you shot in raw, you can also do some dodge and burn using layers (if you use PS), or graduated filters (if you use LR). 1 and 2 can also benefit from ND filters to drag out the shutter timings so as to get a smooth water surface.
About wide angle. A kit lens at 18mm (cropped) or 28mm (full frame) is considered wide angle. You can do a lot with this focal length already. Key is to think about your composition and decided how you want to frame it.
Unless you are talking about UWA (Ultra wide angle). That is another matter.
And I think moby meant this this thread would be be suited for the "Landscape" sub-forum instead of "abstracts and still life".