rude boy hit the nail on the head, except for

quote-Also, due to the inertia of a heavy prop, your airframe will be subjected to more intense vibrations.-Quote

from an engineer's standpoint i think that's wrong. the heavier prop will act to absorb engine vibrations, not amplify them. a lighter prop won't amplify them either, but will absorb less. unless you're prop is out of balance, then no matter what the mass is, it'll shake the hell out of your plane.