[MrWrongsalive]

Would your rattle sound more like a roaring sound? It sounds to me like you may have a bad wheel bearing. Take the car on a test drive and see if the noise increases when hanging a left or right hand turn while the vehicle is traveling at 30mph or faster. If the frequency or pitch of the noise doesn't change on turns then you can rule out the wheel bearings.
Other possible sources of front end noise:
Bad tire surface (visual inspection should rule this out)
Bent or damaged backing plate riding against the rotor.(Visual inspection...)
Bad main bearings within the transmission. (Does the noise change when the clutch is depressed while the car is moving?)
Bad pressure plate spring. (Does the noise change when the clutch is depressed while the car is moving?)
GOOD LUCK