I've done mine plenty of times with no issues. I do use brake "quieter" but I'm not sure that helps with vibrations. I always order from Will, he has a great price on brake pads.
I know that isn't good breaking news, but I'v just never had any problems.
but 3-amigos were present the same between the two sets. OEM were quieter.
Did your brake job somehow cause the 3-amigos?