We at Worldviz have successfully used the Inertia Cube 2+ or 3 for many years (but that requires a serial connector, any connection over USB always has a little bit of 'stutter' in there for head orientation).
I know that some customers of ours are using Trivisio Colibri 3DOF, which seems to work (but i have never personally tried it for longer times).
RE Motionnode, i have not seen this used personally for a head tracked immersive system from all i know.
There are some more possibilities that just the three you named, it might be good if you sent a message to 'sales@worldviz.com'.
also, just so you know, Worldviz can resell almost any VR gear out in the market, so you can also purchase thru us if you want, then we'll make 100% sure that your sensor was tested with Vizard before you receive it.
have fun!
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