Demo - Demo - Demo.
I will say this, when I made the jump from the CX to the V-Type to the A3, I was amazed at the difference I noticed. It is amazing how quick you feel those changes. However, I agree that you should ski the TX into some fast speeds before feeling the need to change. Running consistent 32 MPH passes should be the goal before looking at the higher level skis. I would def move into a Syndicate level from the TX (vs going to a CX - from my experience, not much of a performance jump there).