Looks like you and I both have the same issue. I get this noise also in the same fashion you speak of. When I make a right turn....marbles in a can!! Turn straight...nothing!!! Now I've had my front end work down. My buddy thats a cert. mechanic replaced my drivers side drive shaft and ball joint, which was all busted. The right front passenger side of the car didn't require any repairs. However, I still notice the noise, only this time I know it has to be in the rear of the car. Actually, it sounds as if its on the rear right passenger side. I have Omni Power coil overs all around and everything looked fine when it was jacked up.

I say start in the back on that rear right passenger side. I'm going to do the same soon but just got my baby back out of the paint shop. My $2000 paint job and body work has it looking like a new car. It's not going to get any road time until everything is complete. Didn't have the repair shop look at the back because I wanna give that money to my bud. He'll do the fixing but hasn't had time.

Also, $160 is a bit much just to look at. Ask around and you might get someone that will "just take a look" at a much cheaper price.