I had bad vibration when braking from 50-60 mph. Bentley service book says it's more likely to be worn front suspension components, not brakes. So I jacked up the front end, put in jackstands, and wiggled the wheels. Most motion occurred holding the driver's side wheel at 10:30 and 4:30, and pulling the wheel back and forth. (1:30 and 7:30 on the passenger's side.) So I got a friend to shake the wheel back and forth at those locations, while I laid under it with my hand on each of the 4 link ends - two are bushings, two are ball joints, on each side (8 total). There was detectable motion on all four bushings, and the two ball joints on the control arms. (The trailing link ball joints were OK.) So I replaced the two control arms, which include the bushings and the ball joints, and the two bushings at the forward ends of the trailing links. Problem went away.
You mentioned replacing the control arms, which include the respective ball joints and bushings, but you didn't mention the bushing on the trailing link. Jack up the car, and check for play in those bushings, at the forward end of the trailing links, while somebody shakes the wheels as described above.