I like it lot. I don't think it's a "cheap shot" as you put it, at all. I think you've used very good judgement in the post processing, choosing the colours and textures very carefully (or at least, deciding that the very easy processing you mention gave you a result that you considered worth showing) and I also think the composition (from the original) is good. I'm not really too bothered how you created the final result, I'm only interested in the result. Even if the post processing was easy, you have to use good artistic judgement to create something that isn't gimmicky, where the picture is more than just the special effects.
Anthony