Create logos and imagery

We would like a two images professionally made. We know what we want and have attached an example. We lack the sophisticated software ourselves to make it look really professional. We would want a high quality crystal-clear pngs or bitmaps. The image must be nicely anti-aliased where appropriate. Please note that the SON image must have a transparent background so that it can be copied on top of other imagery. We would like a few different versions of the SON with different writing colour and size. You do not have to use our image of the world, so long as its something similar.