I upgraded from the Terminator (with the latest DSP board prior to the T II) to the Terminator +. The T+ has a tonal balance and presentation almost exactly the same as the Terminator, but with a bit more detail and a smoother top end. I don't regret in the least doing the upgrade, but I suspect the T II is closer to the T+.
In both cases, I coupled the DAC with the Gaia DDC. The Gaia is connected to my streamer (Sonore Signature Rendu SE) using an AQ Diamond USB, and to my DAC with a Tubulus Argentus I2S cable.
The Gaia and T+ make an outstanding combination.