I'm getting the same problem as bluemonkey now also. After a reinstall of console, it ran really well. But the next day the problem came back. Image stutter when moving my head. If I don't move my head, the image is smooth.
I've tried a million things. HAGS/rebar on/off, all 90/120hz modes, nvidia control panel options, different res in steamvr, openXRtoolkit on/off, reprojection on/off, all misc apps on/off, etc, all settings I can think of. Nothing makes any difference.
Happens in game and out of it, so it's not performance related. FPS is great, but tracking stutters.