I've not heard the Triplanar, but I've had the Phantom since September on my 20/2 with XV-1S and I love it. Very easy to set up and to adjust. Very musical, tracks beautifully. Very quiet; hear only the music. mids full and rich, highs airy, base deep and tight. It's not sweet or lush, quite neutral without being analytical.
Hope this helps.
Ed
Hope this helps.
Ed