Lightroom and Aperture allow the photographer to store and file photos AND make adjustments (white balance, tint, sharpness, color balance etc) Either of these will do satisfactory adjustments to probably 95% of your images. Unless you got hundreds of dollars and lot's of hours to learn a program you don't need full blown Photoshop. Photoshop Elements will do all you will need. You would use Elements to remove a lot of backscatter or combine images. There are also a lot of aftermarket filters that work with all of these programs that can be used to enhance your images. I use Aperture (Apple program), Photoshop Elements and Topaz filters. My Suggestion would be to Start with Lightroom (Mac or PC) or Aperture (Mac) and go from there.