Completed the project and I do not think I will replace the right side front Hub Assembly + Bearing because
the soft metallic ring sound is still there when I coast after the left side hub assembly was replaced.
I think it's the brake pad touching the rotor and that is perfectly fine. This sound has been there since I got the car and the dealer cannot identify it.
Re-assembled everything back in reverse order. Tested it from 40 MPH to 5MPH, for about 10 times and it's grabbing very well.
Time to take the car in for brake flush + alignment.