Can attest to Bilstein 6112/5160 being solid options for the price. Makes the car feel more controlled and less wallowy without sacrificing too much comfort. I believe
@ryanCA ended up going the Bilstein route too.
If you can swing it in your budget I’s that along with some upper control arms and the Dr. KDSS panhard correction bracket.
Extra points for replacing those tires controls arms during the refresh. I tackled this job after saving a little bit but was much needed. My control arm bushings, some of the shocks were toast after 175k miles without a squeak. I bet your control arm bushings (especially the fronts) are gone after 300k odd miles.