I'm leaning towards keeping the general air-balloon theme. (Because the agency is called "Perspective", and I help my clients sales go up, so I feel like it kinda makes sense thematically.) But I am open to alternative suggestions.
Final result should be in the form of updated versions of the individual site images to fit easily into the existing html, not just a single image mockup of the new design that needs to be chopped up and coded.
Ideally you could update the html and css as well for colors and fonts, but you can also tell me which colors and fonts to substitute and I can update those elements if you're not as familiar with html & css.