Front end vibration

I have a 95 Nissan Sentra GXE that has front end vibrations that have been getting progressively worse. It is barely perceptable at low speeds. At speeds between 60 - 70 it is really bad. The odd thing is that it is inconsistent. If I go faster, it may smooth out. Sometimes, it will smooth out without changing speed. Going into a curve may cause it to vib rate or smooth out. I have new balanced tires on the front with no change. I had one garage check the suspension. They said it was OK. Another garage told me that both of my CVU joints were bad. I do have some fluid leaking by the right front tire, but when it vibrates, the driver side mirror vibrates, the passenger side is steady. I have already caught both places lying to me, so I do not have any idea what is wrong.

any noises?

bent rim, bad wheel bearing, bad axle (but probably not), bad tie rod, mistorqued wheels, worn suspension bushings.

those are the most likely culprits.

check the cv joint boots if theyre broken and grease is spattered everywhere. did you recently get hit in the front end or hit a curb?