You are selling your bike because the bars vibrate? Try a few things first, heavy bar ends, heli-bars and the most effective method to reduce bar vibration and free, loosen up on your death grip. I have virtually zero vibration when cruising at 70 MPH, so I know it is possible. I ride 120 miles a day back and forth to work and it is a breeze with the cruise control, risers and heavy bar ends.
Edit: It looks as if you are using a Soupy style riser, try the Genmar style as that should give you much more stability toward the end of the clamp instead of it just hanging in the air.