At least with your gear you have some headroom performance wise, I'm pretty much maxed at 1080, anything higher and I'd be looking at 30fps and reducing graphics settings.
As for the TrackIR, out of interest what was the problem with it? For me I guess it's the need to have to sit in a reasonably static position, and wearing a silly hat/cap (I have no shame though and family members even stopped laughing at me...). Took a while to get used to it, but now being happy with the settings I found perfect for my needs I don't like to play Elite without it.
Eye tracking I never tried, wonder how accurate it is.
It was the tracking that got me... having to sit really still otherwise your screen was jerking around all over the place. I have a similar fear of VR to be honest... I do like things to be relatively stable