Had ball joints replaced and rear brakes and rotors, fixed the issue about 50% but when I apply the brakes above 35-40mph, it still vibrates or shakes until you are just about stopped. This only happens when braking, smooth as silk on the highway, straight and true.

Either warped front rotors....or a caliper is slightly hanging up on you....meaning...it's not applying pressure evenly to the rotor when braking.