That is why I asked if you had inspected the rear suspension. The shocks are a minor point.

Tis time to take it to a pro rather than keep wasting time trying to diagnose it over the internet, and throwing even more $'s at it.

 

I know it's been quite a while but I did figure out what the problem without taking it to a shop. Long story short it was the balljoint bolt. I had replaced it with the new one when I did the lower control arms but it was either not seeded all the way the first time or defective from the manufacturer. Either way it was causing the drivers side to move up and down (side to side) when I accelerated or decelerated. I replaced the entire control arm and ball joint again and haven't had the problem again.