If I can be the sole voice of caution here against tapering everything, make sure this is really a good idea for you before sending your nice new trousers under the knife. A few things to consider:
Is it going to flatter your shape? Severe tapering in the lower leg will make your abdomen and core look relatively larger.
Is it going to make you look like you're wearing clown shoes? A small ankle opening and not-small shoes will have that effect.
Are you comfortable with...