The original image for this was 1280x1024 so the 1600x1200 version has just been run through some filters to make it look nice at 1600x1200.
There are 4 files,
1600.jpg - for 1600x1200 resolutions
1280.jpg - for 1280x1024 resolutions
1024.jpg - for 1024x768 resolutions
800.jpg - for 800x600 resolutions
Tell me what you think of it.