I haven't found much correlation between the cost of the scale, how accurate it is (relative to the dr's office) or how long it lasts. Given this, I go for the least expensive digital scale I can find. Then again, I don't care about how it looks, because I store it in the closet anyway.
Some people like the Tanita bioelectrical impedance analysis (BIA) scales, because they ostensibly measure body fat as well as weight. The BIA method is terribly inaccurate and, because it's sensitive to hydration levels, isn't even all that good at measuring trends in BF%. IMO, they aren't worth the money. (You can measure progress in BF% just as easily and cheaply with one of the free online calculators that use waist, hip, neck, and possibly calf measurements.) But, as I said, some people swear by them.