My 2003 roadster facelift idles when fully warm at about 750 rpm. The revs don't fluctuate, I can feel a slight continuous vibration through the car at these revs only. Is this normal?
Have a little search, been discussed before mine idles about 700rpm warm and 1100rpm when cold.
Nothing to worry about there.
As for vibration a better description will enable someone to help you out.