Thanks for everyone's feedback. Below is a new image I created today that takes into account your suggestions:
- color saturation should be up
- I have adjusted the color balance a bit
- higher resolution
- I saved at a slightly lower (higher?) JPG compression/quality ratio to reduce file size, though it hurts a bit to spend time on the images and then see compression artifacts
- this pic actually spans 2 pages. I have tried to make the seam as inconspicuous as possible
- not sure why Pimp and Host is discouraged. Seems fine to me. Any particular reason I should use the other services? Just curious.