Balancing, road force balancing, new wheels, new tires, front control arms, sway bar bushings all replaced. Other front and read suspension bushings checked, guido checked, driveshaft checked, differential mounts checked, engine mounts checked. They said they could start changing things out (shocks, more bushings and mounts) but as they didn't know what the problem was, I wasn't going to throw any more money at it.