Toyo Extensa AS

Recently acquired a used 93 Caddy Coup DeVille and first thing I did was replace the old tires with Toyo Extensa A/S. I suspect these tires would work well with a smaller pasenger vehicle, but for a Cadillac, that's supposwed to have a smooth ride (I also replaced worn undercarriage components, i.e. ball joints, tie rods, and struts), I'm dissapointed in the lack of forgiveness in these tires. I feel every little bump in the road. Gues I should have spent a few more bucks and bought a tire better suited for a luxory car ride. Problem is trying to find one with a white wall.