I have the Rift Touch with very good PC specs and I have noticed a bit of jitter in the video while turning my head, essentially panning or tilting. It happens in the Home screen and in all games, apps. It's not terrible but enough to be annoying. I have tried recalibration, set up numerous times with the same effect. Lights on and off in the room make no difference. No mirrors or reflective wall decorations, USB ok, sensors (2) don't go offline, etc.
4.5GHz i7 AIO with 3 120mm fans, 360mm radiator
GTX-1080 TI SC2 x2 in HB SLI Bridge
Samsung SSD's, 2TB
32 GB DDR4
Not sure what to do next, no lag issues with any games I have played, usually tweaked to full settings. Excellent frame rates.