You can build your ab muscles, then "cut" your body fat. There's no harm in doing them simultaneously or in whichever order. Other than crunches for abs, use machines, balls, and other types of crunches-- inclined, with weights, etc. You could take an ab class, yoga, or something similar, but you'll never escape the crunches.
Oh, and regular old crunches aren't effective for lower abs, you need an incline bench and some lower ab exercises, and you should exercise your back muscles if you are working your abs.