Take this from a person who just returned from South America after taking over 1800 pictures. It is not so much the camera that matters as the storage, and timing. Timing is essential to capturing something that rarely occurs or occurs frequently but never through your eyes until that photo. That photo, in other words, is a glimpse into what you saw that day, and no one can take that from you. I am aware of GIMP but I believe this photo would do fine without filters and image editing unless you are into experimentation regarding such images.
I couldn't stop looking at those clouds trying to guess what might be next; rain, thunder, a storm? :O I certainly agree with you, this photo is much better without editing. It is just like looking from a window.
I've never seen clouds like that! At my place, I scarcely ever see any cloud. I'm awe-struck. Beautiful and a little scary at the same time. I love it.
You can wish for death... but you can't wish it away