The A200's default sharpness setting gives you just a tad of leeway for some additional sharpening in post-processing but with seven available sharpness settings you've got plenty of choice and (if you're confident enough) can adjust sharpening in-camera according to your subjects.
Sharpness: -3
Sharpness: -2
Sharpness: -1
Sharpness: 0 (Default)
Sharpness: +1
Sharpness: +2
Sharpness: +3
Saturation adjustment
Saturation adjustment gives you control over how vivid the colors in your images are. The default setting is fairly well balanced, producing a vibrant but slightly unnatural image. Many photographers prefer it this way but if you're into a more natural rendering of color you can always turn this setting down.