This new headtracker seems to be getting good reviews amongst the youtubers. I haven’t tested it myself.
That tracker looks good if only Amazon had them available. I’ll bide my time.
There are plenty available on eBay if you don’t mind buying directly from a vendor in China. I have to admit that I’m usually a bit hesitant to do that, but never had a problem on the occasions when I have done so.
I love my trackir but I long for the day I don’t have to attach something to my head.